Sir David Attenborough reveals the findings of one of the most ambitious scientific studies of our time - an investigation into what is happening to our oceans. He looks at whether it is too late to save their remarkable biodiversity. Horizon travels from the cold waters of the North Atlantic to the tropical waters of the Great Barrier Reef to meet the scientists who are transforming our understanding of this unique habitat. Attenborough explores some of the ways in which we are affecting marine life - from over-fishing to the acidification of sea water. The film also uncovers the disturbing story of how shipping noise is deafening whales and dolphins, affecting their survival in the future.

Episode Viewers and Ratings

Season 49 Episode 2 of Horizon resulted in a 0.00 rating in the 18-49 demographic.

Horizon Season 49 Episodes...

• s49e01 - Back from the Dead
• s49e02 - The Death of the Oceans?
• s49e03 - What Happened Before the Big Bang?
• s49e04 - Is Seeing Believing?
• s49e05 - A Miracle Cure? A Decade of the Human Genome
• s49e06 - Asteroids
• s49e07 - Deepwater Disaster: The Untold Story
• s49e08 - What is One Degree?
• s49e09 - What Is Reality?
• s49e10 - Science Under Attack
• s49e11 - The Secret World of Pain
• s49e12 - Surviving a Car Crash
• s49e13 - How to Mend a Broken Heart
• s49e14 - Are We Still Evolving?
• s49e15 - Predators in the Backyard

Horizon Show Summary

Horizon is BBC Two's flagship 50-minute science documentary series.

Recognised as the world leader in its field, it regularly wins a sweep of international science, medical and environmental film accolades, and has recently won the Royal Television Society Award and the Prix Italia.

In 2002, the British Academy of Film & Television Arts presented Horizon with the BAFTA Television Award for Best Factual Series or Strand.

In 2003 it won the prestigious Images et Science award for best medical documentary and the Carl von Linne Award at the Living Europe film festival in Sweden. That year, a Horizon co-production with WGBH Boston won the Emmy for best documentary.

In September 2014 it celebrated its 50th anniversary and it continues to enjoy outstanding critical acclaim.