Show Navigation
Search Results
Refine Search
Keywords:
Match all words
Match any word
City:
State (US):
Alabama
Alaska
Arizona
Arkansas
California
Colorado
Connecticut
Delaware
District of Columbia
Florida
Georgia
Hawaii
Idaho
Illinois
Indiana
Iowa
Kansas
Kentucky
Louisiana
Maine
Maryland
Massachusetts
Michigan
Minnesota
Mississippi
Missouri
Montana
Nebraska
Nevada
New Hampshire
New Jersey
New Mexico
New York
North Carolina
North Dakota
Ohio
Oklahoma
Oregon
Pennsylvania
Rhode Island
South Carolina
South Dakota
Tennessee
Texas
Utah
Vermont
Virginia
Washington
West Virginia
Wisconsin
Wyoming
Armed Forces Americas
Armed Forces
Armed Forces Pacific
Country:
United States
Afghanistan
Albania
Algeria
Aland Islands
American Samoa
Andorra
Angola
Anguilla
Antarctica
Antigua/Barbuda
Argentina
Armenia
Aruba
Australia
Austria
Azerbaijan
Bahamas
Bahrain
Bangladesh
Barbados
Belarus
Belgium
Belize
Benin
Bermuda
Bhutan
Bolivia
Bosnia/Herzegowina
Botswana
Bouvet Island
Brazil
British Indian Ocean Territory
Brunei Darussalam
Bulgaria
Burkina Faso
Burundi
Cambodia
Cameroon
Canada
Cape Verde
Cayman Islands
Central African Republic
Chad
Chile
China
Christmas Island
Cocos (Keeling) Islands
Colombia
Comoros
Congo, Democratic Republic
Congo
Cook Islands
Costa Rica
Cote D'ivoire
Croatia
Cuba
Cyprus
Czech Republic
Denmark
Djibouti
Dominica
Dominican Republic
East Timor
Ecuador
Egypt
El Salvador
Equatorial Guinea
Eritrea
Estonia
Ethiopia
Falkland Islands (Malvinas)
Faroe Islands
Fiji
Finland
France
French Guiana
French Polynesia
French Southern Territories
Gabon
Gambia
Georgia
Germany
Ghana
Gibraltar
Greece
Greenland
Grenada
Guadeloupe
Guam
Guatemala
Guernsey
Guinea
Guinea-Bissau
Guyana
Haiti
Heard/McDonald Islands
Honduras
Hong Kong
Hungary
Iceland
India
Indonesia
Iran (Islamic Republic)
Iraq
Ireland
Israel
Isle of Man
Italy
Jamaica
Japan
Jersey
Jordan
Kazakhstan
Kenya
Kiribati
Korea, D.P.R.
Korea, Republic
Kosovo
Kuwait
Kyrgyzstan
Lao, P.D.R.
Latvia
Lebanon
Lesotho
Liberia
Libyan Arab Jamahiriya
Liechtenstein
Lithuania
Luxembourg
Macau
Macedonia
Madagascar
Malawi
Malaysia
Maldives
Mali
Malta
Marshall Islands
Martinique
Mauritania
Mauritius
Mayotte
Mexico
Micronesia, Federated States
Moldova, Republic
Monaco
Mongolia
Montenegro
Montserrat
Morocco
Mozambique
Myanmar
Namibia
Nauru
Nepal
Netherlands
Netherlands Antilles
New Caledonia
New Zealand
Nicaragua
Niger
Nigeria
Niue
Norfolk Island
Northern Mariana Islands
Norway
Oman
Pakistan
Palestinian Territory
Palau
Panama
Papua New Guinea
Paraguay
Peru
Philippines
Pitcairn
Poland
Portugal
Puerto Rico
Qatar
Reunion
Romania
Russian Federation
Rwanda
Saint Kitts/Nevis
Saint Lucia
Saint Vincent/Grenadines
Samoa
San Marino
Sao Tome/Principe
Saudi Arabia
Serbia
Senegal
Seychelles
Sierra Leone
Singapore
Slovakia (Slovak Republic)
Slovenia
Solomon Islands
Somalia
South Africa
South Sudan
S. Georgia/Sandwich Islands
Spain
Sri Lanka
St. Helena
St. Pierre/Miquelon
Sudan
Suriname
Svalbard/Jan Mayen Islands
Swaziland
Sweden
Switzerland
Syrian Arab Republic
Taiwan
Tajikistan
Tanzania, United Republic
Thailand
Timor-Leste
Togo
Tokelau
Tonga
Trinidad/Tobago
Tunisia
Turkey
Turkmenistan
Turks/Caicos Islands
Tuvalu
Uganda
Ukraine
United Arab Emirates
United Kingdom
U.S. Minor Outlying Islands
Uruguay
Uzbekistan
Vanuatu
Vatican City State (Holy See)
Venezuela
Viet Nam
Virgin Islands (British)
Virgin Islands (U.S.)
Wallis/Futuna Islands
Western Sahara
Yemen
Yugoslavia
Zaire
Zambia
Zimbabwe
Model Released:
Yes
No
Any
Property Released:
Yes
No
Any
Orientation:
Vertical
Horizontal
Square
Panoramic
Any
Pricing Type:
Prints
Personal Use
Royalty-Free
Rights-Managed
(leave unchecked to
search all images)
Sort By:
Relevance
Date (most recent)
{ 115 images found }
Loading (
)...
AUS_SCI_DINO_28_xs.jpg
AUS_SCI_DINO_26_xs.jpg
USA_080501_076_xw.jpg
USA_080501_050_xw.jpg
AUS_SCI_DINO_27_xs.jpg
USA_080429_134_xw.jpg
USA_080429_130_xxw.jpg
USA_SCI_NUKE_14_xs.jpg
USA_SCI_NUKE_13_xs.jpg
USA_CA_ES_20_xs.jpg
USA_121027_138_x.jpg
AUS_SCI_DINO_36_xs.jpg
AUS_SCI_DINO_37_xs.jpg
AUS_SCI_DINO_39_xs.jpg
AUS_SCI_DINO_30_xs.jpg
AUS_SCI_DINO_35_xs.jpg
AUS_SCI_DINO_34_xs.jpg
USA_080426_205_xw.jpg
GER_03_xs.jpg
USA_POLL_3_xs.jpg
AUS_27_xs.jpg
GER_02_xs.jpg
POL_031705_016_x.jpg
POL_031705_015_x.jpg
POL_031705_014_x.jpg
VEN_071031_291_xw.jpg
USA_SCI_MED_19_xs.jpg
USA_SCI_MED_17_xs.jpg
USA_080428_057_xw.jpg
AUS_SCI_DINO_12_xs.jpg
AUS_SCI_DINO_11_xs.jpg
USA_SCI_MED_18_xs.jpg
USA_080428_105_xxw.jpg
AUS_SCI_DINO_32_xs.jpg
USA_SCI_PHY_36_xs.jpg
KUW_077_xs.jpg
AUS_SCI_DINO_29_xs.jpg
KUW_076_xs.jpg
SOM_49_xs.jpg
AUS_SCI_DINO_09_xs.jpg
USA_SCI_PHY_28_xs.jpg
USA_SCI_PHY_24_xs.jpg
IND_SCI_PHY_03_xs.jpg
SOM_45_xs.jpg
USA_SCI_PHY_35_xs.jpg
SOM_40_xs.jpg
AUS_SCI_DINO_38_xs.jpg
AUS_SCI_DINO_33_xs.jpg
AUS_SCI_DINO_31_xs.jpg
AUS_SCI_DINO_25_xs.jpg
AUS_SCI_DINO_24_xs.jpg
AUS_SCI_DINO_21_xs.jpg
KUW_074_xs.jpg
KUW_073_xs.jpg
AUS_SCI_DINO_23_xs.jpg
AUS_SCI_DINO_22_xs.jpg
AUS_SCI_DINO_17_xs.jpg
AUS_SCI_DINO_03_xs.jpg
AUS_SCI_DINO_02_xs.jpg
AUS_33_xs.jpg
AUS_32_xs.jpg
AUS_28_xs.jpg
USA_SCI_NUKE_15_xs.jpg
IND_SCI_PHY_04_xs.jpg
IND_SCI_PHY_01_xs.jpg
AUS_34_xs.jpg
AUS_01_xs.jpg
USA_SCI_NUKE_18_xs.jpg
AUS_SCI_DINO_16_xs.jpg
AUS_SCI_DINO_10_xs.jpg
USA_SCI_PHY_34_xs.jpg
Japan_JAP_SCI_PHY_04_xs.jpg
Japan_JAP_SCI_PHY_02_xs.jpg
IND_SCI_PHY_05_xs.jpg
USA_rs_102_qxxs.jpg
USA_SCI_NUKE_20_xs.jpg
USA_SCI_NUKE_16_xs.jpg
Japan_JAP_SCI_PHY_01_xs.jpg
IND_SCI_PHY_02_xs.jpg
Japan_JAP_SCI_PHY_03_xs.jpg
KUW_052_xs.jpg
AUS_26_xs.jpg
MEX_019_xs.jpg
KUW_098_xs.jpg
KUW_095_xs.jpg
KUW_094_xs.jpg
KUW_081_xs.jpg
KUW_079_xs.jpg
KUW_078_xs.jpg
KUW_075_xs.jpg
KUW_049_xs.jpg
USA_SCI_MED_20_xs.jpg
USA_rs_7_qxxs.jpg
Mex_meb_47_xs.jpg
USA_CA_ES_52_xs.jpg
MEX_086_xs.jpg
MEX_022_xs.jpg
KUW_097_xs.jpg
KUW_096_xs.jpg
KUW_093_xs.jpg
Peter Menzel Photography
Home
Legal & Copyright
About Us
Image Archive
Search the Archive
Exhibit List
Lecture List
Agencies
Contact Us: Licensing & Inquiries
![Corey Wilson and John Wilson, members of the Dinosaur Cove excavation team, drill holes in the working face of the mine to allow explosives to be placed. The explosives are used to dislodge large pieces of rock, which are then removed and checked for fossil remains. Dinosaur Cove is the world's first mine developed specifically for paleontology, normally the scientists rely on commercial mining to make the excavations. The site is of particular interest as the fossils found date from about 100 million years ago, when Australia was much closer to the South Pole than today. MODEL RELEASED [1989].](https://m.psecn.photoshelter.com/img-get2/I0000Zcne_cgCVUg/fill=/fit=180x180/I0000Zcne_cgCVUg.jpg)
![Newlyweds Helen and John Wilson after a hard day of drilling and jack hammering at Dinosaur Cove. They are members of the Dinosaur Cove excavation team that is drilling holes in the working face of the mine to allow explosives to be placed. The explosives are used to dislodge large pieces of rock, which are then removed and checked for fossil remains. Dinosaur Cove, near Cape Otway in southern Australia, is the world's first mine developed specifically for paleo-ontological excavations. MODEL RELEASED [1989]](https://m.psecn.photoshelter.com/img-get2/I0000gSV4K3.TPJA/fill=/fit=180x180/I0000gSV4K3.TPJA.jpg)
![Corey Wilson and John Wilson, members of the Dinosaur Cove excavation team cool off in a rock tide pool after drilling holes in the working face of the mine to allow explosives to be placed. The explosives are used to dislodge large pieces of rock, which are then removed and checked for fossil remains. Dinosaur Cove, near Cape Otway in southern Australia, is the world's first mine developed specifically for paleo-ontological excavations. MODEL RELEASED [1989]](https://m.psecn.photoshelter.com/img-get2/I0000wt4eCWm6KY8/fill=/fit=180x180/I0000wt4eCWm6KY8.jpg)
![A mining engineer sets off an explosive charge deep inside a mine. The explosives dislodge large pieces of rock from the working face of the mine. When the dust has settled, these rocks are removed and checked for fossil remains. Dinosaur Cove is the world's first mine developed specifically for paleontology, normally the scientists rely on commercial mining to make the excavations. The site is of particular interest as the fossils found date from about 100 million years ago, when Australia was much closer to the South Pole than today. [1989].](https://m.psecn.photoshelter.com/img-get2/I0000Z9zzn2Rjwkw/fill=/fit=180x180/I0000Z9zzn2Rjwkw.jpg)
![Fossil mining. Research team members at Dinosaur Cove pin steel reinforcing mesh to the wall of their mine with long expansion bolts driven in by a jackhammer. Dinosaur Cove is situated near Cape Otway in southern Australia. Dinosaur Cove is the world's first mine developed specifically for paleontology, normally the scientists rely on commercial mining to make the excavations. The site is of particular interest as the fossils found date from about 100 million years ago, when Australia was much closer to the South Pole than today [1989].](https://m.psecn.photoshelter.com/img-get2/I0000R_8A118OA6k/fill=/fit=180x180/I0000R_8A118OA6k.jpg)
![Dinosaur Cove, near Cape Otway in southern Australia, is the world's first mine developed specifically for paleontology, normally the scientists rely on commercial mining to make the excavations. The mines are at sea level at the base of high cliff. The site is of particular interest as the fossils found date from about 100 million years ago, when Australia was much closer to the South Pole than today. [1989]](https://m.psecn.photoshelter.com/img-get2/I0000a37Yvcwl9W0/fill=/fit=180x180/I0000a37Yvcwl9W0.jpg)
![A team of paleontologists at work at Dinosaur Cove, Australia. They are seen here removing the overburden, rock lying on top of the strata in which the fossils are expected to be found. Dinosaur Cove, near Cape Otway in southern Australia, is the world's first mine developed specifically for paleontology, normally the scientists rely on commercial mining to make the excavations. The site is of particular interest as the fossils found date from about 100 million years ago, when Australia was much closer to the South Pole than today. [1989].](https://m.psecn.photoshelter.com/img-get2/I0000kWH0fbURCRc/fill=/fit=180x180/I0000kWH0fbURCRc.jpg)
![Rebecca Norton, an experienced miner, sets dynamite charges. Cape Otway, southern Australia. Dinosaur Cove is the world's first mine developed specifically for paleontology, normally the scientists rely on commercial mining to make the excavations. The site is of particular interest as the fossils found date from about 100 million years ago, when Australia was much closer to the South Pole than today. MODEL RELEASED [1989]](https://m.psecn.photoshelter.com/img-get2/I0000.r1BLrzxqEQ/fill=/fit=180x180/I0000.r1BLrzxqEQ.jpg)
![Nick Van Klavern, member of the Dinosaur Cove excavation team, remove a fossil with a rock saw. Cape Otway, southern Australia. Dinosaur Cove is the world's first mine developed specifically for paleontology, normally the scientists rely on commercial mining to make the excavations. The site is of particular interest as the fossils found date from about 100 million years ago, when Australia was much closer to the South Pole than today. MODEL RELEASED [1989]](https://m.psecn.photoshelter.com/img-get2/I0000ZOr.kDv1f8o/fill=/fit=180x180/I0000ZOr.kDv1f8o.jpg)
![Hunting for fossils: Mine owner Bob Foster displays fossil dinosaur remains found in an opal mine at "the Sheepyards" mine area Lightning Ridge, southern Australia. Fossil excavations usually follow existing mining operations. The seam of opal-bearing rock is about 100-120 million years old, laid down during the mid-Cretaceous Period, a time of rich diversification of dinosaur species. Australian fossils are particularly interesting, as at that time the continent was much closer to the South Pole than today. This means that many dinosaurs would have had to cope with long periods of permanent darkness during the winter months. MODEL RELEASED [1989].](https://m.psecn.photoshelter.com/img-get2/I0000Ocn3s4vMSXQ/fill=/fit=180x180/I0000Ocn3s4vMSXQ.jpg)
![Hunting for fossils: Mine owner Bob Foster displays fossil dinosaur remains found in an opal mine at "he Sheepyards" mine area of Lightning Ridge, southern Australia. Fossil excavations usually follow existing mining operations. The seam of opal-bearing rock is about 100-120 million years old, laid down during the mid-Cretaceous Period, a time of rich diversification of dinosaur species. Australian fossils are particularly interesting, as at that time the continent was much closer to the South Pole than today. This means that many dinosaurs would have had to cope with long periods of permanent darkness during the winter months. MODEL RELEASED [1989].](https://m.psecn.photoshelter.com/img-get2/I00008gAF81RDTgY/fill=/fit=180x180/I00008gAF81RDTgY.jpg)
![Paleontologist Tom Rich hold fossil skull of leaellynosaurus (named for Leaellyn Rich) in the mine tunnel where it was found at Dinosaur Cove, Cape Otway, southern Australia. Dinosaur Cove is the world's first mine developed specifically for paleontology ?normally the scientists rely on commercial mining to make the excavations. The site is of particular interest as the fossils found date from about 100 million years ago, when Australia was much closer to the South Pole than today. MODEL RELEASED [1989]](https://m.psecn.photoshelter.com/img-get2/I0000YEEINWRM_Iw/fill=/fit=180x180/I0000YEEINWRM_Iw.jpg)
![Leaellyn Rich holds the skull of dinosaur named after her in the mine tunnel where it was found in Dinosaur Cove, Cape Otway, Southern Australia. Dinosaur Cove is the world's first mine developed specifically for paleontology, normally the scientists rely on commercial mining to make the excavations. The site is of particular interest as the fossils found date from about 100 million years ago, when Australia was much closer to the South Pole than today. MODEL RELEASED [1989]](https://m.psecn.photoshelter.com/img-get2/I0000rt2Fm1FcIf4/fill=/fit=180x180/I0000rt2Fm1FcIf4.jpg)
![Dubious dinosaur footprint. Les Price, an opal mineworker examines the cast of a dinosaur footprint in the roof of an opal mine, which he excavated. Dinosaur footprints are preserved when the damp surface material (clay or sand) is baked for a long period by the sun, as at the beginning of a drought. When the overlying water eventually returns, it carries sediments which fill in the footprints, but which are of a different composition to the underlying rock. Here, the excavation of the mine has removed this lower layer (the original 'surface'), leaving the cast of the footprint visible, although it is debatable whether the miner's tools shaped the rock into the shape of a footprint. Photographed at Lightning Ridge, southern Australia. MODEL RELEASED [1989].](https://m.psecn.photoshelter.com/img-get2/I0000LEht1K.HGbU/fill=/fit=180x180/I0000LEht1K.HGbU.jpg)
![Physics: Proton Decay control room. Cleveland, Ohio, Morton Salt Mine proton decay detector located 600 meters underground in the Morton salt mine near Cleveland, Ohio, which consists of a massive tank containing 21 cubic meters of ultra pure water, its walls lined with photomultiplier tubes, which detect faint flashes of Cerenkov light emitted by the passage of charged particles. [1985]](https://m.psecn.photoshelter.com/img-get2/I0000hJiHKLWLWCk/fill=/fit=180x180/I0000hJiHKLWLWCk.jpg)
![The Southern Ocean seen from Dinosaur Cove, near Cape Otway in southern Australia. Dinosaur Cove is the world's first mine developed specifically for paleontology, normally the scientists rely on commercial mining to make the excavations. The site is of particular interest as the fossils found date from about 100 million years ago, when Australia was much closer to the South Pole than today. [1989]](https://m.psecn.photoshelter.com/img-get2/I0000LTjpzCi07x8/fill=/fit=180x180/I0000LTjpzCi07x8.jpg)
![Antipodean dinosaur hunting. Paleontologist Tom Rich holds the skull (in his right hand) and part of the tail of a fossil hypsolophodontid. This was a small dinosaur, about the size of a large chicken, living in the Cretaceous Period about 100 million years BP (before present). The specimen was found at Dinosaur Cove, southern Australia. Examination of the skull indicates that the creature had a large cerebral optic lobe, which suggests that it had some capacity for adapting to darkness. This becomes relevant when considering that it would have lived between 65 and 80 degrees south latitude, and would therefore have had to endure some length of permanent night in winter. Dinosaur Cove is the world's first mine developed specifically for paleontology ?normally the scientists rely on commercial mining to make the excavations. The site is of particular interest as the fossils found date from about 100 million years ago, when Australia was much closer to the South Pole than today. MODEL RELEASED [1989]](https://m.psecn.photoshelter.com/img-get2/I0000RrAmJR_KUdI/fill=/fit=180x180/I0000RrAmJR_KUdI.jpg)
![Paleontologists Tom and Pat Rich relax with their family at Dinosaur Cove camp near Cape Otway, southern Australia. Dinosaur Cove is the world's first mine developed specifically for paleontology, normally the scientists rely on commercial mining to make the excavations. The site is of particular interest as the fossils found date from about 100 million years ago, when Australia was much closer to the South Pole than today. MODEL RELEASED [1989].](https://m.psecn.photoshelter.com/img-get2/I0000lwK06k6Jr0Y/fill=/fit=180x180/I0000lwK06k6Jr0Y.jpg)
![Sunrise from camp at Dinosaur Cove, Cape Otway, Southern Australia. Dinosaur Cove is the world's first mine developed specifically for paleontology - normally the scientists rely on commercial mining to make the excavations. The site is of particular interest as the fossils found date from about 100 million years ago, when Australia was much closer to the South Pole than today. [1989]](https://m.psecn.photoshelter.com/img-get2/I0000jo7xjXSNzt4/fill=/fit=180x180/I0000jo7xjXSNzt4.jpg)
![Lightning bolt across the sky from an approaching afternoon thunderstorm, seen from camp at Dinosaur Cove, Cape Otway, Southern Australia. Dinosaur Cove is the world's first mine developed specifically for paleontology - normally the scientists rely on commercial mining to make the excavations. The site is of particular interest as the fossils found date from about 100 million years ago, when Australia was much closer to the South Pole than today. [1989]](https://m.psecn.photoshelter.com/img-get2/I0000fm9e8Iic.W0/fill=/fit=180x180/I0000fm9e8Iic.W0.jpg)
![Long-exposure view of Dinosaur Cove by moonlight. The streaks in the sky are star trails created by the long time exposure. Dinosaur Cove, near Cape Otway, southern Australia is the world's first mine developed specifically for paleontology, normally the scientists rely on commercial mining to make the excavations. The site is of particular interest as the fossils found date from about 100 million years ago, when Australia was much closer to the South Pole than today. [1989].](https://m.psecn.photoshelter.com/img-get2/I0000v7LIIt9mCcU/fill=/fit=180x180/I0000v7LIIt9mCcU.jpg)
![Beware - dinosaurs! A road sign close to Dinosaur Cove, a major fossil excavation in Australia. The sign, intended to warn of the presence of kangaroos, was altered by one of the volunteer workers at the site. Dinosaur Cove is the first mine devoted to paleontology, most excavations rely on existing commercial mines. [1989].](https://m.psecn.photoshelter.com/img-get2/I00007fETjep0To4/fill=/fit=180x180/I00007fETjep0To4.jpg)
![Rainbow at sunrise as seen from camp at Dinosaur Cove, Cape Otway, southern Australia. Dinosaur Cove is the world's first mine developed specifically for paleontology - normally the scientists rely on commercial mining to make the excavations. The site is of particular interest as the fossils found date from about 100 million years ago, when Australia was much closer to the South Pole than today. [1989]](https://m.psecn.photoshelter.com/img-get2/I0000pTsEZv3uCmQ/fill=/fit=180x180/I0000pTsEZv3uCmQ.jpg)
![Dinosaur Cove excavation team members (Ravile Atlas, Nick Van Klavern & Helen Wilson) relax at Johanna Beach on their day off. Near Cape Otway, southern Australia. Dinosaur cove is the world's first mine developed specifically for paleontology - normally the scientists rely on commercial mining to make the excavations. The site is of particular interest as the fossils found date from about 100 million years ago, when Australia was much closer to the South Pole than today. MODEL RELEASED [1989]](https://m.psecn.photoshelter.com/img-get2/I0000WbV3Hwqa0nI/fill=/fit=180x180/I0000WbV3Hwqa0nI.jpg)
![Double rainbows at dawn as students from Oregon State University arrive at camp at Dinosaur Cove, Cape Otway, southern Australia. Dinosaur Cove is the world's first mine developed specifically for paleontology, normally the scientists rely on commercial mining to make the excavations. The site is of particular interest as the fossils found date from about 100 million years ago, when Australia was much closer to the South Pole than today. [1989]](https://m.psecn.photoshelter.com/img-get2/I0000Enk_lu_Z1mw/fill=/fit=180x180/I0000Enk_lu_Z1mw.jpg)
![Peter Menzel, self-portrait, at dawn in sleeping bag in seaside cave at Dinosaur Cove, Cape Otway, southern Australia. Dinosaur cove is the world's first mine developed specifically for paleontology - normally the scientists rely on commercial mining to make the excavations. The site is of particular interest as the fossils found date from about 100 million years ago, when Australia was much closer to the South Pole than today. MODEL RELEASED [1989]](https://m.psecn.photoshelter.com/img-get2/I0000qS6sgkV3DDc/fill=/fit=180x180/I0000qS6sgkV3DDc.jpg)
![Coober Pedy Opal Mine, Southern Australia. Opal is a form of hydrous silicon oxide. The stones are conglomerates of microscopic spherical particles - opal is never found as a true crystal. The blue/green and dark blue forms seen here are considered to be precious. Opal has a beautiful colored luster due to the varied dispersion of light from its structure. Opal may also be seen in fossils, where it replaces the organic matter (especially bones) in buried remains. [1989]](https://m.psecn.photoshelter.com/img-get2/I0000fCAZROH9VjM/fill=/fit=180x180/I0000fCAZROH9VjM.jpg)
![Les Price, opal miner, above mineshaft with dinosaur footprints at Lightning Ridge, Australia. Dinosaur footprints are preserved when the damp surface material (clay or sand) is baked for a long period by the Sun, as at the beginning of a drought. When the overlying water eventually returns, it carries sediments which fill in the footprints, but which are of a different composition to the underlying rock. Here, the excavation of the mine has removed this lower layer (the original 'surface'), leaving the cast of the footprint visible, although it is debatable whether the miner's tools shaped the rock into the shape of a footprint. MODEL RELEASED [1989]](https://m.psecn.photoshelter.com/img-get2/I0000SrJd5y0rjmI/fill=/fit=180x180/I0000SrJd5y0rjmI.jpg)
![Proton decay experiment to determine the ultimate stability of matter..Proton decay. A technician [works with] a 20" (50cm) photomultiplier tube used in the search for proton decay. Hundreds of such tubes line a tank containing 9000 tons of water some 1000 meters underground in a zinc mine in Japan. Tokyo University's Kamiokande experiment was designed to look for decaying protons. If a proton decays, the charged particles it generates move through the water faster than light, and so generate blue 'Cerenkov' radiation. It is this that the photomultipliers detect. Computers then decide whether the event was a decay, or a collision with a solar neutrino. Japan. (1985)](https://m.psecn.photoshelter.com/img-get2/I0000uvdBlshQGUM/fill=/fit=180x180/I0000uvdBlshQGUM.jpg)
