Latest Triassic–Jurassic extinction event Stories
Results stem from largest ever examination of fossil marine species It's well known that Earth's most severe mass extinction occurred about 250 million years ago. What's not well known is the specific time when the extinctions occurred. A team of researchers from North America and China have published a paper in Science this week which explicitly provides the date and rate of extinction. "This is the first paper to provide rates of such massive extinction," says Dr. Charles Henderson,...
A scientific team led by Brown University has learned how dinosaurs became rulers of Earth more than 200 million years ago. Widespread volcanism and a spike in atmospheric carbon dioxide wiped out half of all plant species, and extinguished early crocodile relatives that had competed with the earliest dinosaurs. Results appear in the Proceedings of the National Academy of Sciences. A shade more than 200 million years ago, the Earth looked far different than it does today. Most land on the...
- Like a worm in form or movement; vermiform; tortuous or sinuous; also, writhing or wriggling.
- Like the track or trace of a worm; appearing as if worm-eaten; vermiculate.
- Marked with fine, close-set, wavy or tortuous lines of color; vermiculated.
- A form of rusticated masonry which is so wrought as to appear thickly indented with worm-tracks.