• Penelope Boston
• Cave scientist

• Speaking at TED2006
• February 2006
• Monterey, CA

Life on Mars? Let's look in the caves: So the Mars Rovers didn't scoop up any alien lifeforms. Scientist Penelope Boston thinks there's a good chance -- a 25 to 50 percent chance, in fact -- that life might exist on Mars, deep inside the planet's caves. She details how we should look and why.