Geologists have calculated the age of Earth at 4.6 billion years. But for humans whose life span rarely reaches more than 100 years, how can we be so sure of that ancient date? It turns out the ...

we know we can touch rocks that are 1.7 billion years old.

All the Latest Game Footage and Images from Radiometric Dating A visual novel/dating simulator where you can date rocks! You play as a geology student who gets transported to a magical world during ...