Life took root more than four billion years ago on our nascent Earth, a wetter and harsher place than now, bathed in sizzling ultraviolet rays.
Former President Bill Clinton said he “wouldn't be surprised” if Earth was eventually visited by aliens.
Some meteorites supply molecules that can be used as building blocks to make certain kinds of larger molecules that are critical for life.
A rare, recently discovered microbe that survives on very little to eat has been found in two places on Earth: spacecraft clean rooms in Florida and South America.
Planets rich in carbon, including so-called diamond planets, may lack oceans, according to NASA-funded theoretical research.
A team of British scientists is convinced it has found proof of alien life, after it harvested strange particles from the edge of space.
A group of international scientists including a Lawrence Livermore National Laboratory researcher have confirmed that life really could have come from out of this world.
In a new finding scientists believe the collisions of comet in our solar system increases the chance of life across it.
What if we got to land on Europa's surface and conduct something along the lines of a more in-depth interview?
How did life on Earth get started?
Lake Vostok is so dark, deep and cold that scientists had considered it a possible model for other planets, a place where nothing could live.
As proof of extraterrestrial life, one Chinese farmer's crudely built rubber alien
Mars rover, Opportunity, is driving to a new study area after a dramatic finish to 20 months on "Cape York" with examination of a rock intensely altered by water.
NASA's Mars rover Curiosity just might be the latest in a long line of Mars-exploring robots to discover the building blocks for primitive life on the Red Planet.
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