i_like_spam writes "The theory that the dinosaurs were wiped out by an asteroid impact, the K-T extinction, is well known and supported by fossil and geological evidence. Asteroid impact theory does not apply to the other fluctuations in biodiversity, however, which follow an approximate 62 million-year cycle. As reported in Science, a new theory seems to explain periodic mass extinctions. The new theory found that oscillations in the Sun relative to the plane of the Milky Way correlate with changes in biodiversity on Earth. The researchers suggest that an increase in the exposure of Earth to extragalactic cosmic rays causes mass extinctions. The original paper describing the findings is available online."

Logged in users have noticed for some time the request to drink from the Slashdot Firehose. Well now we're ready to start having everybody test it out. It's partially a collaborative news system, partially a redesigned & dynamic next-generation Slashdot index. It's got a lot of really cool features, and a lot of equally annoying new problems for us to find and fix for the next few weeks. I've attached a rough draft of the FAQ to the end of this article. A quick read of it will probably answer most questions from how it works, what all the color codes mean, to what we intend to do with it.