Catch up on stories from the past week (and beyond) at the Slashdot story archive

 



Forgot your password?
typodupeerror
For the out-of-band Slashdot experience (mostly headlines), follow us on Twitter, or Facebook. ×
Science

+ - Ancestor of All Placental Mammals Revealed->

sciencehabit writes: The ancestor of all placental mammals—the diverse lineage that includes almost all species of mammals living today, including humans—was a tiny, furry-tailed creature that evolved shortly after the dinosaurs disappeared, a new study suggests. The hypothetical creature, not found in the fossil record but inferred from it, probably was a tree-climbing, insect-eating mammal that weighed between 6 and 245 grams—somewhere between a small shrew and a mid-sized rat. It was furry, had a long tail, gave birth to a single young, and had a complex brain with a large lobe for interpreting smells and a corpus callosum, the bundle of nerve fibers that connects the left and right hemispheres of the brain. The period following the dinosaur die-offs could be considered a "big bang" of mammalian diversification, with species representing as many as 10 major groups of placentals appearing within a 200,000-year interval.
Link to Original Source
This discussion was created for logged-in users only, but now has been archived. No new comments can be posted.

Ancestor of All Placental Mammals Revealed

Comments Filter:

"Any excuse will serve a tyrant." -- Aesop

Working...