We've been scribbling our thoughts down on stone and paper for a while now. But the job of assembling a history for all of humanity gets a lot harder once those written records disappear. Luckily, archaeologists are happy to tackle the job.
WHAT'S INSIDE: EARTH SCIENCE
Sometimes dinosaur fossils are too large and heavy to display without damaging them. How are those enormous models built? And what makes them look so realistic?
Let's say you have a lunch date to make – and it's on the other side of the planet. Wouldn't it be way more convenient to pop down a hole and take a 42-minute journey through Earth's innards?