Should Pluto become a planet again?

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"Make Pluto a planet again" was the call this week from Donald Trump’s NASA Administrator, Jared Isaacman. The icy body was first seen in 1930 and was the only planet whose discovery was claimed by the United States. In 2006, though, it was officially stripped of its planet status. Tom Whipple is joined by astronomer Chris Lintott to discuss the debate that has raged ever since over whether Pluto should or shouldn’t be reinstated as the solar system’s 9th planet. We also hear about the big money scientific prize hoping to lead to breakthroughs in how humans can communicate with animals. Head judge Professor Yossi Yovel, from Tel Aviv University, and finalists Dr Catherine Crockford, from…