Here's a rare promo for ABC's Dinosaurs, which might've actually been our first look at the Sinclairs. Most people remember the show, but I'm sure far fewer recall how heavily ABC promoted it before it was even on TV. (Think "Gabbo" from The Simpsons.) | Dinosaur Dracula

Since the 1980s, scientists have believed that the main culprit for the dinosaur extinction was an asteroid. It came from the far reaches of the solar system, and was the size of Mount Everest. Don't miss Earth, a story 4.5 billion years in the making. Find out where to watch 👉 https://www.bbcearth.com/shows/earth | BBC Earth