Posted by tourdemars to Mars Society at May 5, 2003 12:00 PM

Scientists estimated that in five billion years the sun will become a red giant, swallowing up Earth and everything else in its path. Darlene Lim, a PhD student in geology and an expert on Mars exploration, is planning ahead. “Eventually we will lose our biosphere; we will actually have to get humans off this planet,” she says. “We have to get beyond the Earth and then potentially move outside our own solar system.”