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Seeing the pattern
In the final part of this lush documentary series, Sir David turns his eye to the jazzier end of the animal spectrum.
He's looking at beauty, specifically in colours and patterns, and asks: why do some creatures advertise themselves so boldly?
The zebra looks great, but what purpose does its stripes have? Darwin rejected the idea they're for camouflage, and he knew a thing or two.
And why is the beautiful butterfly so gorgeous? Take a look at our clip and find out more.
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'Were there such things as mermaids?'
There are some creatures that are so strange, the myths surrounding their existence gave rise to wild theories. In this exclusive interview with Sir David Attenborough, he discusses unicorns, mermaids, and elephants.
Come on, Sir David – who believes in elephants these days?
Keep on your toes, too, because Sir David also sets you a magnificent trivia question…
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A curious twist
You spin me right round, baby, right round. Like a narwhal, baby, right round, round round.
This instalment is all about twists, from the humble snail's shell to the exotic narwhal's unicorn-like horn.
Mother Nature knows what she's about, so why has she taken some creatures down a twistier path than others? Sir David has the answers.
Click on the icon to the right to hear more in our interview.
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The mole rat
Down in the dirt beneath our feet, something lurks and it isn't pretty.
It's the mole rat, naked from the day its born until the day it dies, a staggering 28 years later.
What is it about the wrinkly mole rat that makes it the longest living rodent? Could its ugliness, sorry, its challenging beauty, be somehow the secret of its success?
If anyone can tell us, Sir David can.