Kids science question no. 5

all the dinosaurs go? Written by Dr Bryan Hatton Posted in Uncategorized Comments Leave a comment Where did all the dinosaurs go? Letterbox Lab is a science subscription box coming soon to UK families. We answer tough questions that children love to ask, and suggest experiments that they'd love to try to find out the answers! For over 150 million years there were giant reptiles running around the Earth and in a very short space of time they all disappeared. That’s pretty crazy! We have a fairly good idea of why it happened.