An image of the interior of a Martian rock. Some scientists believe the worm-like shape is a fossil of a microbe from Mars. Click on image for full size (35K JPG ) Courtesy of NASA

A recent study shows there is a possibility that we came from Mars! No, that doesn't mean a spaceship flew here and dropped us off. Rather, scientists say chunks of rock were thrown off the Red Planet billions of years ago. These rocks may have contained tiny microbes that started life on Earth.

"The ancestral cell for life on Earth must have originated somewhere in our own solar system," said Curt Mileikowsky, an astronomer of the Royal Institute of Technology in Stockholm and a leader of the research team.

Scientists say Mars is a logical source of life. They say trillions of rocks were broken off Mars by colliding asteroids. If this is true, then a large number of these rocks would have made it to Earth. Unfortunately, only a few Martian rocks have been found, but scientists say there are more to be discovered.

Although there is no chance for life to exist on Mars now, long ago the planet was capable of supporting life. At that time, it had mild temperatures, the proper atmosphere and water. In order for the microbes to make it to Earth, they must have been buried deep inside the rocks. The rock itself would protect the microbes from radiation and the intense heat that would come from entering our atmosphere.

"If the size (of the rock) is more than a football," he said, "heat would not have time to get inside."

An image of the interior of a Martian rock. Some scientists believe the worm-like shape is a fossil of a microbe from Mars. Click on image for full size (35K JPG ) Courtesy of NASA

A recent study shows there is a possibility that we came from Mars! No, that doesn't mean a spaceship flew here and dropped us off. Rather, scientists say chunks of rock were thrown off the Red Planet billions of years ago. These rocks may have contained tiny microbes that started life on Earth.

Scientists say Mars is a logical source of life. They say trillions of rocks were broken off Mars by colliding asteroids. If this is true, then a large number of these rocks would have made it to Earth. Unfortunately, only a few Martian rocks have been found, but scientists say there are more to be discovered.

Although there is no chance for life to exist on Mars now, long ago the planet was capable of supporting life. At that time, it had mild temperatures, the proper atmosphere and water. In order for the microbes to make it to Earth, they must have been buried deep inside the rocks. The rock itself would protect the microbes from radiation and the intense heat that would come from entering our atmosphere.

An image of the interior of a Martian rock. Some scientists believe the worm-like shape is a fossil of a microbe from Mars. Click on image for full size (35K JPG ) Courtesy of NASA

Did we come from Mars? Scientists say that tons of rocks came to Earth from Mars many years ago. These rocks broke off of Mars when asteroids ran into it.

They say that tiny organisms called microbes were living inside the rocks! They may have landed here and started life.

We do know that there can't be life on Mars now because it's too hot and we haven't found any water. But a long time ago, it was cooler and there was water.