Dec 04, 2002 | SCIENCE
Are Aliens a Bunch of Smarty-Pants?
(Astrobiology Magazine) - Scientists debate how long it takes to grow a brain.
Sep 23, 2002 | SCIENCE
Rings Around the Earth: a Clue to Climate Change?
(Sandia National Labs) - An asteroid impact may have formed temporary rings around Earth, much like the rings of Saturn.
Aug 28, 2002 | SCIENCE, MISSIONS
SOHO Discovers 500th New Comet
(ESA) - The SOHO spacecraft's observations reveal just how massive comets can be.
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.
Aug 05, 2002 | SCIENCE
First Evidence for Early Bombardment of Earth
(Spaceflight Now) - Researchers have discovered the first earth-bound evidence of an asteroid and comet bombardment that may have shaped life on our planet.
Aug 02, 2002 | SCIENCE
Risk from Asteroid 2002 NT7 Eliminated
(NASA) - Last week, rough calculations showed a tiny chance of an impact in 2019. Refined calculations have dismissed any threat for the foreseeable future
Jul 31, 2002 | SCIENCE
Danger from Asteroid Continues to Shrink
(NASA) - The odds that asteroid 2002 NT7 will strike Earth are now down to one in 1.1 billion.
Jul 29, 2002 | SCIENCE
Asteroid Threat Downgraded
(NASA) - New data show Asteroid 2002 NT7 will not strike Earth in 2019. There remains a one in 380,000 chance of an impact in 2060.
Jul 24, 2002 | SCIENCE
Remote Chance of Asteroid Impact in 2019
(NASA) - The risk, which appears extremely small, may be calculated more accurately after a few more days' observations.
Jul 23, 2002 | SCIENCE
The Earth is a Tough Place
(Space.com) - At a conference in Australia, astrobiologists turned their attention to geology: the early Earth, evidence of asteroid impacts, and deadly super-volcanoes
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.
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.
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.
Aug 27, 2001 | SCIENCE
New UK Information Center on Asteroid Threat
(British National Space Centre) - Britain has revealed plans to open a new center to inform the public of the possible threat of asteroids colliding with Earth.
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 25, 2001 | SCIENCE
A Taste for Comet Water
(NASA Astrobiology Institute) - New evidence suggests that comets provided the water that fills the Earth's oceans.
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.
May 18, 2001 | SCIENCE
Galactic Habitable Zones
(NASA Astrobiology Institute) - The Sun may be one of the few stars in the Galaxy capable of supporting complex life.
Jan 29, 2001 | SCIENCE
Without Jupiter, home alone
(NASA Astrobiology Institute) - The giant planet Jupiter swallows up asteroids and comets, or flings them into space. Without Jupiter, comet and asteroid impacts might have wiped out any life on Earth.
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 24, 2000 | SCIENCE
Asteroid estimates too low, says scientist
(BBC) - A scientist claims that the number of potentially hazardous asteroids has been underestimated by 20 percent.
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 05, 1999 | SCIENCE
Another potentially hazardous asteroid discovered
(SpaceViews) - The odds that the near-Earth asteroid will strike Earth in either 2042 or 2050 are less than one in 100 million -- extremely slight, but not zero. Asteroid and comet impacts may have altered the evolution of life on Earth, and may affect Earth's future habitability.
