Jim AlKhalili shows how difficult it is to calculate simple sums with the Roman numeral system.
Neil Oliver meets archaeologist Lindsey Simpson, who explains how Vikings in Ireland can be identified by their grave sites and how their bones have worn.
Neil Oliver demonstrates the use of ballistae, the bolt throwers the Celts faced as the Romans sought to conquer Britain in the first century BC.
A quick exploration of the huge variety of plants in the world, from a pine tree that is thousands of years old, to a bamboo that grows 30 metres high in just 90 days.
The class learns about trust, confidentiality and secrets. Program facilitator Bernadette challenges students to consider the ethical boundaries of good secrets versus bad secrets, and the responsibility we all have to protect others from harm.
After a successful revolutionary war, a newly independent America embarked on whole new political system for its people.
The Incas established a huge and well connected empire that was supported by 'roadworks' call the Inca Trail
Sam Willis dines in traditional Uzbek food and notes the similarities to Chinese, Italian and Indian cuisines.
Filmed in ultra slow-motion, 48 collisions are recorded between dancers, boxers, martial artists, gymnasts, football players, wrestlers and street culture enthusiasts.
A French doctor's diary describes the psychological impact of bombing on soldiers and archival footage reveals PTSD suffered by casualties.
Researchers have found the mere act of thinking can create new connections in the brain and neuroplasticity is intrinsic.
Naturally Australia describes how fishing and tourism brings people to the Great Barrier Reef, and why those industries need to be managed to keep the reef healthy.
An overview of Facebook and the effect of the network.
Science class develops wellbeing strategies to help deal with stress ahead of exams.
Brian Cox demonstrates the use of Isaac Newton's laws of motion and universal gravitation to calculate the reentry of the Soyuz spaceship and landing in Kazakhstan.
Ross Kemp meets a man who smuggles people into Britain in his truck. He says he's doing a good thing.
Members of the French Estates-General swore an oath to enact their own National Assembly.