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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.

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

(Impact Theory). The general perception with the public regarding the extinction of the dinosaurs is that they were wiped out by a meteorite impact. This theory ...

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

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

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.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," ...

www.ucmp.berkeley.edu/education/events/cowen1b.html

The most recent work on the K-T extinction has centered on two hypotheses that suggest a violent end to the Cretaceous: a large asteroid impact and a giant ...

www.scientificamerican.com/article/asteroid-killed-dinosaurs

Mar 4, 2010 ... A single asteroid impact near the Yucatan remains the best ... off the planet, scientists have always regarded this impact theory as a hypothesis ...