Data released yesterday shows that since 2001 there have been 26 kiloton yield impacts with the earth. Fortunately most have been at remote sites and were high altitude detonations. But...will the next one hit a bullseye somewhere?
http://phys.org/news/2014-04-astronauts-reveal-sobering-asteroid-impacts.html (http://phys.org/news/2014-04-astronauts-reveal-sobering-asteroid-impacts.html)
Sobering video at this link.
https://b612foundation.org/ (https://b612foundation.org/)
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I hope Worden understands that "dinosaur" killer asteroids hitting the planet and "time scales of millions of years" don't actually have anything to do with each other.