NASA HEADQUARTERS, WASHINGTON — Scientists have long wondered how life could have evolved on Earth if the sun's radiation flares were so much more powerful billions of years ago.<br /><br />According to planetary scientists, the Earth's magnetic field could not have protected living organisms around 4 billion years ago, when these organisms were supposed to have formed out of Earth's primordial soup.<br /><br />Now a group of NASA scientists say they have found some evidence that might support a theory that would explain this mystery. <br />The researchers took another look at moon rocks that were brought to Earth by the Apollo missions.<br /><br />The NASA study's results were published in the journal Science Advances. According to the study, the researchers found evidence in the moon rocks that the moon probably did have a stronger magnetic field back then.<br /><br />Researchers theorize that this moon magnetosphere could have been quite strong, and that the Earth was much closer to Earth back then -- allowing for the possibility that the magnetospheres of the moon and Earth could have interacted.<br /><br />The theory states that the magnetic fields of the moon and Earth could have combined to create a more protective magnetosphere around the Earth. In this way, the Earth's surface could have been protected enough to make evolution possible.
