Researchers found a total of 138 volcanoes in the West Antarctic Ice Sheet overlying the West Antarctic Rift System, 91 of which had never before been identified. Basically they have never seen those types of volcanoes before.
This is due to sahara desert and cold water current flowing on it
Earth’s atmosphere traps heat from the sun, which makes Earth’s temperature suitable for living things.
Yes they are people constantly on the ISS station (international space station)