Sir David Attenborough is planning to make another 'Planet Earth'.

Sir David Attenborough

Sir David Attenborough

The second instalment of the nature documentary only hit screens last year - a decade after the first was released - but the 91-year-old legendary presenter is hoping that he can make a third series because he has no plans to retire before he's 100.

Speaking to The Sun newspaper, he said: "I see no reason whatsoever why I can't live past 100. Earth has enough wonders to make more than three 'Planet Earth' series.

"The beauty of natural history programmes is they can appeal across all ages and all conditions and people can take out of it their own particular interests."

And the naturalist will have time to start focusing on the third series now as his new documentary 'Blue Planet II', which dives into the marine life, will drop this weekend.

Bosses at the BBC announced they were planning to do a second instalment of 'Blue Planet' after 'Planet Earth II' went down such a storm with viewers late last year.

The forthcoming series, which was filmed over four years using new camera technology and techniques, was last on screens six years ago.

The new-and-improved technology used during filming allowed the camera crew to capture predatory fish and dolphins front on as well as get up close to whale sharks.

The crew also used two unmanned submersibles, which allowed them to record footage from 1,000 metres under the Antarctic Ocean, to capture footage of never-before filmed creatures, including hairy-chested Hoff crabs, snub fin dolphins that spit water, and a tool-using tusk fish.

Meanwhile, although David thoroughly enjoys looking into life on land and sea, he's got no desire to pay a visit to space.

He explained: "There's no life in space.

"Here we've got this wonderful kaleidoscope, this fantastic world."