Link (http://www.cnn.com/2007/TECH/science/03/28/mammal.evolution.ap/index.html)
Contrary to what was previously believed, dinosaur extinction did not immediately benefit mammalian evolution in terms of a huge speciation event. Two other large events happened much later (in geological terms).
Very strange fact given the enormous room for niche exploration.
Very interesting.
Here's another one about gimpy lizards and snake evolution, in case you didn't see it:
http://news.nationalgeographic.com/news ... source=rss (http://news.nationalgeographic.com/news/2007/03/070326-lizard-snakes.html?source=rss)