<p>This week learned exactly how an asteroid would kill us, how vultures help our ecosystem, that the feeling of nails-on-a-chalkboard may be a distinct emotion, and that elephants get no sleep.</p>

38: This week I learned you could probably outrun a T. Rex, and more

Your audio guide to the most fascinating and fun revelations, reports, and studies on the internet. Quick, concise, and infectiously entertaining, This Week I Learned promises to make learning fun again.