It might sound bizarre, but one of the Galapagos islands is so remote that it has allowed a species of dandelion to evolve independent of other competing species. These dandelions grow so tall that they resemble huge rainforest trees.
Africa has had a profound impact on Sam Best, friends notice he is more chatty, outgoing and happier than before the trip.
A good discussion starter for classrooms. For years we have been asking how Stonehenge was built - but the much bigger question is why.
Sam Willis studies the seventh century Sogdian murals at Afrasiab, also know as the Ambassadors' Painting, and discusses the place of the Sogdian court in trade along the Silk Road.
Verbally is not the only way humans communicate. Professor Robert Winston takes a look at the power of body language and the effect it can have on the people you are interacting with.
After Adam Goodes is named Australian of the Year in 2014, the media asks him if the date of Australia Day should be changed. Discussion: After watching this clip of The Final Quarter, do you think the date of Australia Day should be changed? Why or why not? Do you think an alternative celebration should take its place?
Do people really become loafers once they are part of a bigger team? The experiments tests the theory.
Neil Oliver meets metallurgist Marcos MartinonTorres who demonstrates how silver was extracted from lead by Romans.
In The Final Quarter we see Goodes kick a goal during the 2015 indigenous round. He celebrates with a ceremonial war dance directed towards the Carlton fans. Discussion point: He is accused by some of inciting anger. Do you think those criticisms are fair or was he simply celebrating his Aboriginal culture?
Scientists explain how Neptune captured its largest moon, Triton, and discuss the satellite's geyser plumes.
Sam Willis visits a museum in Xi'an, where he sees how paper was made and discusses how the technology found its way to the Middle East.
Albert Wiggal shows Brendan Moar the kind of rafts the Bardi people would have used to travel and fish around One Arm Point in the Kimberley region.
Constantinople was once called the 'new Rome'.
Two Lockerbie plane bombing witnesses discuss their reactions of bewilderment, shock and sadness when faced with the bodies of the victims.
Learn why some are dark and others are white, how they create rainbows, halos and sun dogs, and how clouds are formed.
Cook set off to the great unknown southern land on the ship the 'Endeavour' with 94 people and a goat! As Captain, he took responsibility to care for all of those in his charge. How did Cook prevent scurvy among his crew?
Female green turtles dig into the sand on Raine Island to lay around 100 pingpong ballsized eggs each, leaving them to incubate in the warm sand, before returning to the water.
Returning to Australia, Sam does something he could never have done before - he delivers a perfect speech in front of his class on his African journey.