A Science Test. What could naturally Push this button?

Hello Troops,
Send in your answers with proof this happened before and could happen again. You'll get your information listed below.

• (Mr. Williamson). An Asteroid Hit. Large collisions—with five kilometer objects—happen approximately once every ten million years. The last known impact of an object of 10 km or more in diameter was at the Cretaceous-Tertiary extinction event 65 million years ago.
• (Alex A). The Black Plague. Decimated Europe in only two years. Anywhere from 30 - 60 percent of the population was infected. It caused religious, social, and economic upheavals. Historians estimate it took 150 years for Europe to recover fully.
• (Jaden F) Noah's Ark! You know, that huge flood waaaaaaaay back in the day, when Noah had to build an ark. =D Pretty good, eh? ;)

Thursday at the Imaginarium. Beware: Imaginations Crossing. Collisions could Result in Inspiration!

Life, the Universe, & Everything, a Symposium on Science Fiction and Fantasy at BYU.

I'll be signing books this Saturday at 1 pm at the BYU Bookstore along with Brandon Mull, Brandon Sanderson, Howard Tayler, Eric James Stone, Berin Stephens, Jake Black, Roger White, Lisa Mangum, Mette Ivie Harrison, and John Brown. This is part of Life, the Universe, & Everything, a Symposium on Science Fiction and Fantasy. The event runs Thursday - Saturday from 9 am until 9 pm. It's FREE to attend. Come listen to panels and presentations on everything sci-fi and fantasy!

http://ltue.org

Aleta Clegg, writing as Jaleta Clegg
www.jaletac.com
www.nexuspoint.info