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en.wikipedia.org/wiki/Alvarez_hypothesis

The most easily observable consequence of such an impact would be a ... acid rain, depending on what type of rock the asteroid struck.

en.wikipedia.org/wiki/Giant-impact_hypothesis

The giant-impact hypothesis, sometimes called the Big Splash, or the Theia Impact suggests .... Collisions between ejecta escaping Earth's gravity and asteroids would have left impact heating signatures in stony meteorites; analysis based on ...

www.pnas.org/content/95/19/11028.full

Sep 15, 1998 ... Confirmation that a large meteorite impact in Mexico correlates with a ... Like all good hypotheses, the Alvarez impact hypothesis generated a ...

hoopermuseum.earthsci.carleton.ca/saleem/meteor.htm

THE ALVAREZ HYPOTHESIS. (Impact Theory). The general ... The Alvarez pinned the cause of the extinction on the meteorite impact. This theory came to be ...

www.pbs.org/wgbh/evolution/extinction/dinosaurs/asteroid.html

Hypothesis: Asteroid Impact. Did a collision with a giant asteroid or comet change the shape of life on Earth forever? It is widely agreed that such an object -- 10 ...

www.enchantedlearning.com/subjects/dinosaurs/glossary/Alvarez.shtml

ALVAREZ ASTEROID IMPACT THEORY, Dinosaur glossary explains basic paleontological terms.

www.livescience.com/26933-chicxulub-cosmic-impact-dinosaurs.html

Feb 7, 2013 ... Artist's impression of a 6-mile-wide asteroid striking the Earth. Scientists now have fresh evidence that such a cosmic impact ended the age of ...

www.livescience.com/1162-study-single-meteorite-impact-killed-dinosaurs.html

Nov 28, 2006 ... The dinosaur's extinction was triggered by a single large meteorite ... "The sample we found strongly support the single-impact hypothesis," ...

blogs.scientificamerican.com/history-of-geology/httpblogsscientificamericancomhistory-of-geology20110727the-younger-dryas-impact-hypothesis

Jul 27, 2011 ... Based on this discovery Firestone later developed as alternative explanation the meteorite hypothesis, according to him the hypothesis could ...

news.nationalgeographic.com/news/2013/09/130910-comet-impact-mammoths-climate-younger-dryas-quebec-science

Sep 10, 2013 ... The iconic Manicouagan meteor crater in Quebec is pictured in this handout ... A proponent of the impact hypothesis, a geological consultant ...