The latest national and international news, exploring the day's events from a global perspective.

On the Canary island of La Palma the team use the Liverpool and Isaac Newton telescopes to go comet chasing, seeing if Comet C/2012 S1 ISON develops a beautiful tail. Show more

Series about whales and dolphins. Explore the ocean's largest creatures - humpback whales, 200-ton feeding blue whales and southern right whales with one-ton testicles. Show more

Simon Sebag Montefiore looks at Istanbul's Greek roots, its transformation into the capital of a Christian empire and reveals how clashes forced eastern and western churches apart. Show more

Documentary exploring the human quest for certainty and sound reasoning itself. Dave Cliff asks just how logical we really are and whether humans can stay ahead of computers. Show more

The story of the top-heavy Mary Rose, the wrecking of the Spanish Armada and the real-life sea disasters that inspired The Tempest and Robinson Crusoe. Show more

Horizon follows the astronomers pushing the limits of science and engineering with a new generation of supertelescopes in the hunt for mysterious objects in the universe. Show more

On the Canary island of La Palma the team use the Liverpool and Isaac Newton telescopes to go comet chasing, seeing if Comet C/2012 S1 ISON develops a beautiful tail. Show more

Series about whales and dolphins. Explore the ocean's largest creatures - humpback whales, 200-ton feeding blue whales and southern right whales with one-ton testicles. Show more

Simon Sebag Montefiore looks at Istanbul's Greek roots, its transformation into the capital of a Christian empire and reveals how clashes forced eastern and western churches apart. Show more