Life’s first handshake.
The findings support the theory that the building blocks for life were delivered to Earth with comets.
Microfossil prey containing puncture holes were discovered in the Grand Canyon.
Honing in on the origins of life on Earth.
"People will need to rewrite the textbooks."
Before that, life could not have evolved.
Here are the leading theories on where that first spark of life came from.
The discovery of fossilized bacteria in rock samples from deep beneath the ocean floor indicate that the very first life-forms arose from a rich soup of minerals concocted in hydrothermal vents.