Scientists reconstruct ancient impact that dwarfs dinosaur-extinction blast
(Phys.org) —Picture this: A massive asteroid almost as wide as Rhode Island and about three to five times larger than the rock thought to have wiped out the dinosaurs slams into Earth. The collision punches ...
Astrobiologists claim meteorite carried space algae
New computer simulations reveal possible violent history of giant asteroid Vesta
Most precise dates yet suggest comet or asteroid impact was last straw for dinosaurs
While many assume that a comet or asteroid impact killed off the dinosaurs, the actual dates of the impact and extinction are imprecise enough that some have questioned the connection. UC Berkeley and Berkeley ...
Study rebuts hypothesis that comet attacks ended 9,000-year-old Clovis culture
(Phys.org)—Rebutting a speculative hypothesis that comet explosions changed Earth's climate sufficiently to end the Clovis culture in North America about 13,000 years ago, Sandia lead author Mark Boslough ...
New type of 'space weathering' observed on asteroid Vesta
The surface of the giant asteroid Vesta is weathering in a way that appears to be completely different from any other asteroid yet visited, according to new data recorded by NASA's Dawn spacecraft. This new ...
Dawn mission discovers hydrogen on giant asteroid Vesta (w/ Video)
(Phys.org)—The first measurements of the elemental composition of the surface of the giant asteroid Vesta indicate that hydrogen was brought to the body by impactors, research by a team led by Planetary ...
Dinosaur die-out might have been second of two closely timed extinctions
The most-studied mass extinction in Earth history happened 65 million years ago and is widely thought to have wiped out the dinosaurs. New University of Washington research indicates that a separate extinction ...
More asteroids could have made life's ingredients
(PhysOrg.com) -- A wider range of asteroids were capable of creating the kind of amino acids used by life on Earth, according to new NASA research.
Study suggests dinosaurs killed off by more than one asteroid
Scientist says nuclear weapons may be best bet for saving Earth from asteroids
Experts reaffirm asteroid impact caused mass extinction 65 million years ago (w/ Video)
(PhysOrg.com) -- Responding to challenges to the hypothesis that an asteroid impact caused a mass extinction on Earth 65 million years, a panel of 41 scientists re-analyzed data and provided new evidence, ...
California's Channel Islands hold evidence of Clovis-age comets
A 17-member team has found what may be the smoking gun of a much-debated proposal that a cosmic impact about 12,900 years ago ripped through North America and drove multiple species into extinction.
Study uncovers forces that hold gravity-defying near-earth asteroid together (Update)
Researchers at UT have made a novel discovery that may potentially protect the world from future collisions with asteroids.