蜜芽传媒

An astrophysicist says it would not be 鈥渟ensible鈥� for humans to embark on a one-way mission to Mars.

Dutch project Mars One aims to send teams of four on one-way trips to the red planet every two years from 2025, until 40 people are living there.

Jodrell Bank astrophysicist Professor Tim O鈥橞rien said: 鈥淚 think if you can get there then you ought to be thinking about how to get people back.鈥�

However, he added that he would 鈥渂e surprised鈥� if humans did not step foot on the red planet in 鈥�20 to 30 years鈥�.

This clip is originally from the Hit List on Sunday 14 June 2015.