Latest Extinction events Stories
Environmental selectivity during three of the â€˜Big Fiveâ€™ mass extinction events focus of two paleontologistsâ€™ latest research.
Algae, not asteroids, were the key to the end of the dinosaurs, say two Clemson University researchers.
A mysterious basin off the coast of India could be the largest, multi-ringed impact crater the world has ever seen. And if a new study is right, it may have been responsible for killing the dinosaurs off 65 million years ago.
Danish-led scientists say an analysis of rock found only in the world's oldest oceans has shed light on how large animals obtained a foothold on Earth. The team led by University of Copenhagen Professor Robert Frei said it has, for the first time, plotted the rise and fall of oxygen levels in the Earth's atmosphere that occurred during the last 3.8 billion years. By analyzing the isotopes of chromium in iron-rich sediments formed in the ancient oceans, the team found a rise in atmospheric...
Drifting across the worldâ€™s oceans are a group of unicellular marine microorganisms that are not only a crucial source of food for other marine life
An international team of geologists may have uncovered the answer to an age-old question - an ice-age-old question, that is. It appears that Earth's earliest ice age may have been due to the rise of oxygen in Earth's atmosphere, which consumed atmospheric greenhouse gases and chilled the earth.
A Princeton University geoscientist who has stirred controversy with her studies challenging a popular theory that an asteroid wiped out the dinosaurs has compiled powerful new evidence asserting her position.
The enduringly popular theory that the Chicxulub crater holds the clue to the demise of the dinosaurs, along with some 65 percent of all species 65 million years ago, is challenged in a new paper published Monday.
Large size and a fast bite spelled doom for bony fishes during the last mass extinction 65 million years ago, according to a new study to be published March 31, 2009, in the Proceedings of the National Academy of Sciences.
According to researchers, brainpower may have enabled birds to survive in the midst of mass extinction.
- A pivoted catch designed to fall into a notch on a ratchet wheel so as to allow movement in only one direction (e.g. on a windlass or in a clock mechanism), or alternatively to move the wheel in one direction.