goldilocks

People love challenges, but on the condition that the challenge does not exceed the maximum difficulty they can tolerate.

A new theory states that if conditions change only slightly, lush life can exist on Venus, thereby causing the Earth to become a dead planet.

Astronomers have developed an index system of elements of a planet, helping to assess and classify the potential of life there.

American space experts say it is time for people to actively communicate with aliens, not just receiving signs of extraterrestrial life.