CNN.com - RSS Channel - HP HeroElectric robots are mapping the seafloor, Earth's last frontier

For centuries, humans have explored the Earth's mountains, jungles and deserts. But despite covering more than 70% of the Earth's surface, the ocean is still a relative mystery. In fact, we know more about the surface of Mars than we do about the sea floor; just over 20% of the ocean bed has been mapped.

October 27, 2021 at 07:07AM https://ift.tt/3jECh8h centuries, humans have explored the Earth's mountains, jungles and deserts. But despite covering more than 70% of the Earth's surface, the ocean is still a relative mystery. In fact, we know more about the surface of Mars than we do about the sea floor; just over 20% of the ocean bed has been mapped.