With the help of some surprising creatures from around the world, this series sets out to discover how animals take to the air, defying the force all airborne animals must conquer, gravity. Part 2: Masters of the Sky This episode looks at powered flight, revealing why peregrine falcons can top 200 miles an hour, how a hummingbird is a slave to its own rather manic lifestyle and that the albatross's secret to flying for free is its nose. Heavyweight beetles break the rules to find love, a devious sparrow-hawk uses agility to execute a lightning-fast raid on his prey and half a million mother bats dominate the sky above, and below, the ground with a dazzling display of aerial prowess.
It may take two to make a baby - but not necessarily two to bring it up. So what makes a parent decide to stay or go? Especially if that parent is a dad. From the California mouse mother who has to kickstart her partner's paternal instincts, to Adelie penguin parents who can't leave their eggs alone for five minutes; from cheetah mums practicing promiscuity to keep the dads on side, to flamingo parents both producing milk for their young. We see just how far these incredible parents go in order to protect and nurture as many offspring as possible through to adulthood.
Watching the fascinating display of leafcutter ants at the Natural History Museum in London is one of my favourite ways to while away a few hours, but David Attenborough is operating on a much grander scale here in the last in the series. In Argentina he observes some cousins of the leafcutters who are part of a community so vast it spans an entire continent. It’s one of the mandible-dropping facts in a look at one of the key inventions of arthropods: colonies. From termites and honey bees to the leafcutters, it seems that if you want to get ahead, you move to the big city.
We reveal the weird and wonderful stories of some of the natural world's incredible single parents: their devotion, dedication and often jaw-dropping endeavour in order to see their babies through to adulthood. From the slow loris covering her baby in toxic saliva to the Weddell seal putting her pup through winter boot camp, a weedy sea dragon cleverly camouflaging his eggs against his body and the female giant Pacific octopus sacrificing herself for her brood - we see how these parents are prepared to go the extra mile to arm the next generation with what they need to survive.
Sharks are among the most misunderstood predators on the planet, but an international team of scientists is trying to change that. Their research is revealing that sharks can be sociable and intelligent, and they could even help solve some of the toughest medical challenges of the 21st century. However, their breakthroughs come just as many sharks face extinction. Science may now be the only way to save them.