Home:English >> science >> What Is The Worst Possible Disaster That Could Befall Earth?

What Is The Worst Possible Disaster That Could Befall Earth? 2009-02-02 01:46:05

Interplanetary Dust Particle: NASA Texas-size asteroids make for exciting summer blockbusters, but when it comes to long-term damage, they're not the most menacing threat out there. Lurking at th ...
Interplanetary Dust Particle: NASA

Texas-size asteroids make for exciting summer blockbusters, but when it comes to long-term damage, they're not the most menacing threat out there. Lurking at the edge of our galaxy are giant molecular dust clouds -- agglomerations of hydrogen gas, small organic molecules and minerals -- roughly 150 light-years across. If our solar system hit one, it would take 100,000 years to pop out on the other side.

During that time, the dust would accumulate in the atmosphere and block out nearly all light from the sun. The oceans would freeze over and terrestrial plants would die off, leading to a near-total extinction of life, says Alexander Pavlov, a NASA-affiliated astrobiologist at the University of Arizona. The good news? We probably won't hit one for at least 40 million years.

The Universe Made Simple

The Universe Made Simple

Starworthy: Brian Klutch Take a guided tour of the cosmos, led by a robotic telescope. Meade’s ...
The Universe Made Simple

The Universe Made Si...

Starworthy: Brian Klutch Take a guided tour of the cosmos, led by a robotic telescope. Meade’s ...
A DIY Proposal

A DIY Proposal

Two days, plenty of propane, and a lot of patience yields a one-of-a-kind engagement ring The One...
What If None of This Is Real?

What If None of This...

A simulated black hole of ten solar masses: Ute Kraus Also in today's links: an endangered speci...

Powered by www.so77.net