Elon Musk said Tuesday in a podcast with Lex Fridman that SpaceX could land a human on Mars in the next five to ten years.

Fridman, an AI researcher working on autonomous vehicles, human-robot interaction, and machine learning at MIT, interviewed Musk on his podcast and asked when Musk thought SpaceX would land a human on Mars.

“But the truly big leap, again in this category of seemingly impossible is to put a human being on Mars. When do you think SpaceX will land a human being on Mars?” Fridman asked.