Nearly all fossils we find - around 99% - are from marine animals such as shellfish and sharks 🦐 🐚 🦈. They lived in the sea, where sand or mud could bury their remains quickly after they died. So how do dinosaurs, which lived on land, fossilise? #FossilFriday http://bit.ly/NHM-Dino-fossils-Sep19 | Natural History Museum, London

What makes a fossil? What are the different types? What makes amber fossils so special... and what causes bone to become rock? Expand your knowledge of these windows into our past world – in four minutes. | National Geographic UK