What is the deepest place a human has been underground?
What is the deepest place a human has been underground? After five years, the Kola well had reached 7km (about 23,000ft). Work continued until the project was abandoned in 1989 because the drill became stuck in rock at a little over 12km (almost 40,000ft or 8 miles) deep. That is the current record for a depth reached by humans.
What would humans look like if they lived underwater?
Human bodies would be bigger to limit heat loss. They would likely grow webbed fingers and toes. Eventually, people would have fused legs and larger eyes. They'd look quite a bit like mermaids!