Curiosity is calling. Humanity now has conclusive evidence of what could be the building blocks of Martian life. The rover Curiosity, which has been exploring the Red Planet since 2012, has identified large carbon-based molecules, similar to kerogen on Earth, in a dry lake bed. While experts say it’s too soon to tell whether the organics stem from life forms or geological processes, the need for samples to analyze on Earth could spur future missions. NASA is already planning a 2020 rover that will retrieve 30 Martian rock cores.