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![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)
![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)
![Genetically engineered tomato plants. Geneticist Dr Virginia Ursin examines cultures of Flavr Savr tomato plants; the first genetically engineered whole food. Each dish contains seedlings cultured from a single cell, grown on agarose medium. Flavr Savr tomatoes have a gene that allows the fruit to ripen on the vine without softening; so they are tastier, don't need ripening with ethylene gas, and are not damaged during shipping. Tomato softening occurs due to the enzyme polygalacturonase. Flavr Savr tomatoes contain an anti-sense gene that blocks the enzyme. This tomato entered American supermarkets in 1994 but was withdrawn from the marketplace by Monsanto (which bought Calgene in 1997). Research at Calgene, California, USA. MODEL RELEASED [1995]](https://m.psecn.photoshelter.com/img-get2/I0000jdQAv1Zvelk/fill=/fit=180x180/I0000jdQAv1Zvelk.jpg)
![Genetically engineered tomato plants. Geneticist Dr. Virginia Ursin examines cultures of Flavr Savr tomato plants; the first genetically engineered whole food. Each dish contains seedlings cultured from a single cell, grown on agarose medium. Flavr Savr tomatoes have a gene that allows the fruit to ripen on the vine without softening; so they are tastier, don't need ripening with ethylene gas, and are not damaged during shipping. Tomato softening occurs due to the enzyme polygalacturonase. Flavr Savr tomatoes contain an anti-sense gene that blocks the enzyme. This tomato entered American supermarkets in 1994 but was withdrawn from the marketplace by Monsanto (which bought Calgene in 1997). Research at Calgene, California, USA. MODEL RELEASED [1995]](https://m.psecn.photoshelter.com/img-get2/I0000LcgMqijyW94/fill=/fit=180x180/I0000LcgMqijyW94.jpg)
![Examination of the DNA banding pattern in an electrophoresis gel, during the preparation of a DNA sequencing autoradiogram. DNA (obtained from a plant cell in this case) is cut into fragments by a restriction enzyme. These fragments are separated into bands by the electrophoresis process. The banding pattern in pink fluorescence is revealed under ultraviolet light. Photo taken at Escagen, Inc., San Carlos, California, USA. [1987]](https://m.psecn.photoshelter.com/img-get2/I0000xfCyZm4OA.I/fill=/fit=180x180/I0000xfCyZm4OA.I.jpg)
![Genetically engineered tomato plants. Geneticist Dr Virginia Ursin examines cultures of Flavr Savr tomato plants; the first genetically engineered whole food. Each dish contains seedlings cultured from a single cell, grown on agarose medium. Flavr Savr tomatoes have a gene that allows the fruit to ripen on the vine without softening; so they are tastier, don't need ripening with ethylene gas, and are not damaged during shipping. Tomato softening occurs due to the enzyme polygalacturonase. Flavr Savr tomatoes contain an anti-sense gene that blocks the enzyme. This tomato entered American supermarkets in 1994 but was withdrawn from the marketplace by Monsanto (which bought Calgene in 1997). Research at Calgene, California, USA. MODEL RELEASED.[1995]](https://m.psecn.photoshelter.com/img-get2/I0000r_XF2AHkdIk/fill=/fit=180x180/I0000r_XF2AHkdIk.jpg)
