Mar 07, 2005 | SCIENCE
NASA Study Suggests Giant Space Clouds Iced Earth
(NASA - ARC) - According to two recent technical papers supported by NASA's Astrobiology Institute, giant clouds in space may have led to global extinctions.
Jan 13, 2003 | MISSIONS
CHIPS Satellite Lifts Off
(NASA) - The spacecraft will look for traces of a supernova that may have altered life on Earth.
Oct 01, 2002 | SCIENCE
Video: an Interview with Andrew Knoll
(NASA Astrobiology Institute) - A world without elephants? Paleontologist Andrew Knoll discusses what he calls "the biotic crisis."
Sep 13, 2002 | SCIENCE
Antarctic Animals Feel the Heat
(BBC) - Warming of the waters surrounding Antarctica may mean extinction for much of the continentÂs local sea-life
Aug 27, 2002 | SCIENCE
Dino-Killer Asteroid Triggered Huge Tsunamis
(Discovery) - Ancient landslides along the Pacific Coast tell of a 65-million-year-old asteroid impact.
Jul 08, 2002 | SCIENCE
Protecting the Planet: Q&A with Asteroid Hunter David Morrison
(Space.com) - Morrison describes the hunt for objects that could pose a potential threat to Earth.
Jun 04, 2002 | SCIENCE
Stephen Jay Gould Remembered
(SF Chronicle) - Gould argued that evolution proceeds not smoothly, but in fits and starts.
May 17, 2002 | SCIENCE
Age of Dinosaurs Bracketed by Asteroid or Comet Impacts
(Columbia Univ.) - New research bolsters the theory that the age of dinosaurs not only ended with an asteroid or comet impact, but began with one as well.
May 13, 2002 | SCIENCE
Cosmic Catastrophe
(BBC) - A scientist believes that an exploding star will one day wipe out life on Earth.
Mar 14, 2002 | SCIENCE
Exploding Star May Have Sparked Earth Disaster
(CNN) - Scientists argue that a nearby supernova caused a mini-extinction of marine life 2 million years ago.
Jan 28, 2002 | SCIENCE
The Great Dying
(NASA) - The worst mass extinction in Earth's history may have been caused by an asteroid or comet impact.
Jan 09, 2002 | SCIENCE
Radiation from Space May Affect Biological Evolution
(UT Austin) - Bursts of radiation from the Sun, from supernovae, or from deep space might wipe out life on other planets. Then again, they might speed up life's evolution.
Sep 06, 2001 | SCIENCE
Asteroid or Comet Caused Earth's Largest Mass Extinction
(Space.com) - Scientists working in China have have unearthed additional evidence that the Permian-Triassic extinction was triggered by an asteroid or comet impact.
Jun 29, 2001 | SCIENCE
Mercury Accused of Dislodging Asteroid that Doomed Dinosaurs
(Space.com) - A shift in the orbit of Mercury may have perturbed the asteroid belt, nudging an asteroid toward Earth.
Jun 15, 2001 | SCIENCE
Do We Know What Killed the Dinosaurs?
(NASA Astrobiology Institute) - Exactly how a single asteroid impact caused so much devastation remains a matter of debate.
May 21, 2001 | SCIENCE
Mass Extinction that Led to Rise of Dinosaurs Happened Quickly
(NASA Astrobiology Institute) - The age of dinosaurs not only may have ended with an asteroid or comet impactÂit may have started with one.
Apr 27, 2001 | SCIENCE
Asteroid/Comet Impacts and Human Evolution
(Space.com) - A pair of British scientists argue that asteroid or comet impacts may have influenced human evolution.
Mar 08, 2001 | SCIENCE
Dinosaurs may have died off quickly
(BBC) - New research supports the idea that an asteroid or comet impact wiped out the dinosaurs.
Dec 18, 2000 | SCIENCE
Asteroid impact: Dinosaurs may have died of poisoning or suffocation
(CNN/AP) - The asteroid impact might have stirred up sulfur compounds, which are toxic and acidic, or carbon dioxide, which could have robbed the dinosaurs of oxygen.
Nov 22, 2000 | SCIENCE
Scientists simulate how an asteroid dug a crater
(Space.com) - The impact in the Yucatan peninsula 65 million years ago may have wiped out the dinosaurs.
Oct 09, 2000 | SCIENCE
Do mammoth bones hold clues to mass die-off?
(MSNBC/AP) - A researcher argues that a virus wiped out most species of large mammals 13,000 years ago.
May 31, 2000 | SCIENCE
Evidence that dinosaurs died quickly from asteroid impact
(CBC) - A new study of the fossil record suggests that dinosaurs became extinct abruptly. The finding supports the theory that they were wiped out by an asteroid.
Oct 11, 1999 | SCIENCE
How an asteroid impact causes extinction
(explorezone.com) - Objects from space may have played a crucial role in the evolution of life on Earth.
Sep 02, 1999 | SCIENCE
Dinosaurs may have been thriving just before asteroid impact
(Chicago Tribune) - Scientists have debated whether dinosaurs were wiped out by an asteroid, or whether they were already in decline when the asteroid hit. Rich fossil finds in South America suggest they were still going strong shortly before the catastrophe.
Aug 28, 1999 | SCIENCE
Debate: were mass extinctions caused by impacts or volcanoes?
(New Scientist) - In this book review, a scientist discusses possible causes of mass extinctions 65 million years ago, including a comet or asteroid impact, and an increase in volcanic activity.
Aug 06, 1999 | SCIENCE
Are plants going the way of the dinosaurs?
(Christian Science Monitor) - Scientists raise concerns about plant extinctions.
Aug 03, 1999 | SCIENCE
Nearby Supernova May Have Caused Mini-Extinction
(Science Daily) - Radioactive material beneath the ocean floor could have been left by a supernova 5 million years ago.
Jan 13, 1996 | SCIENCE
Did Cancer Kill the Dinosaurs?
(New Scientist) - Collapsing stars might release enough neutrinos to sicken animals on planets light-years away.
Jan 13, 1995 | SCIENCE
Exploding Star May Have Caused Earthly Extinctions
(AP) - Radiation from a nearby supernova may have devasted life on Earth 225 million years ago.
