Today - Curiosity scientist: 50/50 chance of life on Mars - ÃÛÑ¿´«Ã½ Sounds

Today - Curiosity scientist: 50/50 chance of life on Mars - ÃÛÑ¿´«Ã½ Sounds
Curiosity scientist: 50/50 chance of life on Mars
NASA's Curiosity rover has detected increased levels of methane on Mars.