Scientists say the dinosaur died during the impact 66 million years ago.
The possible galaxy, located 13.5 billion light-years from Earth, has broken the record for farthest astronomical object ever seen.
A keyhole-shaped lesion found in the frill of Big John, the largest Triceratops skeleton ever found, may have been made by a rival Triceratops.
Scientists have crafted a new message for intelligent extraterrestrials