Dinosaur-killing asteroid was a rare rock from beyond Jupiter, new study reveals 

 Scientists have uncovered the "genetic fingerprint" of the dinosaur-killing Chicxulub impactor, potentially revealing the fateful rock's origins in the outer reaches of our solar system. 

https://cdn.mos.cms.futurecdn.net/LbMuZArMBytjSTzVbDTXjX.jpg

https://www.space.com/asteroid-chicxulub-composition-beyond-jupiter