
Mars "Spirit." — AFP/Getty Images
10. Michio Kaku
What's next? Eminent physicist Michio Kaku says the big space news of the coming 50 years will be confirming that we are not alone in the universe. "We'll find planets with oceans, oxygen in the atmosphere, microbial life and maybe even intelligent life," Kaku says. "Perhaps we'll even be able to eavesdrop on their conversations." (Read the full interview.)











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