The idea that life begun on mars and travelled to earth is sometimes called panspermia. Here is the definition:
Panspermia is a hypothesis that the seeds of life are prevalent throughout the Universe, and furthermore that life on Earth began by such seeds landing on Earth and propagating. The idea has its origins in the writings of Anaxagoras, but was first proposed in its modern form by Hermann von Helmholtz in 1879. Panspermia can be said to be either interstellar (between star systems) or interplanetary (between planets in the same solar system) There is as yet no compelling evidence to support or contradict it, although the majority view holds that panspermia — especially in its interstellar form — is unlikely given the challenges of survival and transport in space.
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- "It's surprisingly easy to get material from Mars to Earth," says Gladman. "If you launch stuff off Mars, there aren't a lot of other places to go." He found that up to 5 percent of the rocks launched from Mars land on Earth within 10 million years. Many arrive much sooner— some within a few years.
- The next question: Could microbes aboard survive ejection and impact? To escape a planet's gravity, a rock must accelerate from zero to at least 11,500 miles per hour in a thousandth-of-a-second jerk so intense it would liquefy a human. But when Jay Memos and his colleague Rachel Mastrapa loaded bacteria into bullet casings and shot them into cold plastic modelling clay, they found that most bacteria survived. Mileikowsky, too, has tested this idea by firing cannon shells stuffed with pebbles holding hundreds of millions of ordinary bacteria. Again, most of the cells lived.
- Another factor that supports the idea of life evolving from mars is that mars’ atmosphere contains water which as far as it is know is one of the necessities of life.
- Also if there is water in the atmosphere this could be evidence to show that water once flowed around the planet.
- The planet’s surface is covered in many rocks and pebbles this is more evidence for water and therefore life.
- Another factor towards this evidence is that if we look at our own planet earth there are many extreme conditions that life is still present. The hottest deserts and deepest ocean are all home to amazing weird and wondrous animals plants, and organisms that the idea of life on mars suddenly is not just nonsense
- Due to the ever-cooling solar say piece of rock from Mars, which landed on when a hit Mars and scattered its rocks, contains signs of life. Small fossils and evidence of a basic once-living micro-organism provided the strongest proof yet that life did once exist on Mars billions of years ago universe it has been said that mars would have had a higher temperature, this would have made conditions more suitable for life.
- A piece of rock from Mars, which landed on when a hit Mars and scattered its rocks, contains signs of life. Small fossils and evidence of a basic once-living micro-organism provided the strongest proof yet that life did once exist on Mars billions of years ago
