Mars: Spiky Hedgehogs, Alzheimer’s, And Meteorites

Fourth from the sun. First in the cray.

Follow NowThis News on Facebook and Twitter.
The NowThis News app is live — and it’s FREE! Download it.

View this embed ›

Check out more articles on BuzzFeed.com!

 
  Your Reaction?
 

    Starting soon, you'll only be able to post a comment on BuzzFeed using a Facebook account or via our app. If you have questions or thoughts, email us here.

    Hot Buzz

    This Is How An Artist Uses Only Ballpoint Pen To Draw

    People With Disabilities Are Having Their Photos Stolen And Facebook Isn’t Helpin...

    Now Buzzing