Mass extinction at the Triassic-Jurassic boundary
...Who did it? Who pulled the trigger, or rather, what pulled the trigger at the Triassic-Jurassic boundary that wiped out 20% of all marine families in Earths oceans, and, on land, most non-dinosaurian archosaurs, most therapsids, and the last of the large amphibians? Whatever it was, it shot down much of the competition so dinosaurs could later dominate the Earth.... ..."The Triassic-Jurassic...Jurassic period mammal teeth found; prevailing theories challenged
. . . . (Santa Barbara, Calif.) Paleontologists have discovered three tiny teeth.embedded in a piece of lower jawbone from a small Jurassic period mammal on the.island of Madagascar, evidence that some of our mammalian ancestors roamed the.Earth at exactly the same time as the dinosaurs, according to an article in the.Sept. 2 Nature.. . The finding more than doubles the age of the....St. Paul, MN (November 16, 1998) -- Bees, trapped for millions of years in.ancient amber, recreated by scientists using the perfectly preserved DNA. The.stuff of science fiction thrillers? Yes and no. The entire creature can't be.recreated. However, bacteria extracted from the abdomen of these long-dead bees.has, for the first time ever, been successfully brought back to life. .Dr. Raul Cano,....CSIRO entomologist Dr John Lawrence admits it was a thrill:. the delicate bronze-and-white spiny beetle glittering in the. light of his microscope was a living fossil, whose ancestral. roots go back almost 200 million years. . "The peculiar look of the animal caught my eye straight. away. The unique combination of spines, scales and lack of wings.. At first I was puzzled, then I realise...