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Presenter Steve Backshall spends time in bed with Jessica, the world's only hippo habituated to people.

Filming for the new BBC series Deadly 60 near Hoedspruit, in South Africa, Steve is introduced to Jessica by retired game keeper Tonie Joubert and his wife Shirley.

"In a lifetime working with animals, this is the weirdest thing I've ever seen," says Steve.

Deadly 60 will be broadcast on the CBBC channel each Thursday at 1715 BST, starting on 28 May