From colossal farms in America to the destruction of the Amazon, Liz Bonnin investigates how our hunger for meat is killing our planet. Show more

Dr Alice Roberts follows a trail of clues from ancient human bones to the frontiers of genetic research to discover if we are still evolving, and where we might be heading. Show more

A look at how the Coldstream Guards, who now serve as a bodyguard to the Queen, are still motivated by a history which stretches back to the English Civil War. Show more

Anita Rani and Justin Rowlatt continue their epic car journeys across China, heading for their final destination, the financial mega-city of Shanghai. Show more

Dr Alice Roberts finds out how the experts put dinosaur skeletons back together, with muscles, accurate postures and even, in some cases, the correct skin colour. Show more

A closer look at the cats who stood out in the experiment conducted in The Secret Life of the Cat, where 50 felines were fitted with GPS collars to track their every movement. Show more

Series exploring topical scientific issues. To celebrate its 50th birthday, Horizon invites the public to play a role in tackling the greatest challenges facing science today. Show more

In the final episode, Ade heads to Scandinavia. As he travels across the region, he learns about winter temperature rises, sees Copenhagen's attempt to go carbon neutral and meets Greta Thunberg. Show more

Ade sees the damage that climate change is causing, and finds out how we can fight it – and whether eating sea urchin gonads will help. Show more

In the first episode of this two-part series, Simon Reeve travels from the islands of the Aegean to Greece's capital, Athens, meeting an extraordinary cast of characters. Show more

Simon Reeve continues his Australian adventure. He travels from Darwin in Australia's Northern Territory, across to the Cape York Peninsula, and on to the Great Barrier Reef. Show more

From golden handprints of the president to the scene of a massacre, in Kazakhstan Ben Zand experiences the sinister and bizarre sides to living in a dictatorship. Show more

Ben Zand visits Belarus. To find out what life is like in a dictatorship, he bathes in the rumoured source of the president's powers and comes face to face with the KGB. Show more

Ben Zand visits Tajikistan. From enforced beard shaving to being tracked down by the police, he experiences the sinister and bizarre side to living in a dictatorship. Show more

On the second leg of his journey around the Caribbean Sea Simon Reeve visits the beautiful island of Barbados and travels along the coast of South America. Show more

Ade Adepitan embarks on the second leg of his journey around Africa. This time he is in Central Africa, travelling from Gabon to Uganda, via the Democratic Republic of Congo. Show more

Documentary series. Ade Adepitan embarks on the first leg of his journey around Africa. He travels from Cape Verde to Senegal and the Ivory Coast, before finishing in Nigeria. Show more

Ade begins this leg of his journey in Tanzania, in Selous Game Reserve. He is on the lookout for elephants but numbers in this park have fallen by 90% over the last few decades. Show more

The last leg of Ade Adepitan’s tour sees him travelling from the beaches of Mozambique, through South Africa. At Paradise Island, Ade finds an abandoned hotel. Show more

Horizon explores the boom in health-related apps and gadgets, as well as how technology is helping medical professionals monitor fitness and health in unprecedented ways. Show more