Earth is about 4.5 billion years old. Scientists think that by 4.3 billion years ago, Earth may have developed conditions suitable to support life. The oldest known fossils, how… See more

Two possibilities are in volcanically active hydrothermal environments on land and at sea. Some microorganisms thrive in the scalding, highly acidic hot springs environme… See more

The recipe consists of a steady energy source, organic compounds and water. Sunlight provides the energy source at the surface, which drives photosynthesis. On the ocean fl… See more

There are several theories for how life came to be on Earth. These include: As a University of Chicago graduate student in 1952, Stanley Miller performed a famous experimen… See more