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Chemistry: Discovering the Elements

   2010    Science
Just 92 elements made up the world, but the belief that were only four - earth, fire, air and water - persisted until the 19th Century. Professor Al-Khalili retraces the footsteps of the alchemists who first began to question the notion of the elements in their search for the secret of everlasting life.He reveals the red herrings and rivalrie ...s which dogged scientific progress, and explores how new approaches to splitting matter brought us both remarkable elements and the new science of chemistry.   Show More
Series: Chemistry

Humpback Whale

   2006    Nature
Few sounds are more beautiful or moving than the underwater songs of the humpback whale. Male whales compete with their songs, which often last for 10 minutes at a time, and can be repeated for hours on end. Whales separated by thousands of miles of sea will sing almost identical songs. Researchers have found that the songs change throughout ...the breeding months, following a mysterious pattern repeated across the waves. Whales also use sound to hunt. To catch herring, humpback whales release a stream of bubbles to form a shimmering, circular fishing net. Emitting a repetitive loud scream, they scare the fish into a tight ball, then lunge out of the water to swallow the shoal whole. Now it seems that the long-held image of the gentle giant must change to one of a ferocious and opportunistic hunter.   Show More
Prehistoric Planet II

Prehistoric Planet II

2023  Science
Asia

Asia

2024  Nature
Wonders Of The Universe

Wonders Of The Universe

2011  Science
Big Oil vs The World

Big Oil vs The World

2022  Nature
Empire of the Tsars

Empire of the Tsars

2017  History
Blue Planet II

Blue Planet II

2017  Nature
Living Universe

Living Universe

2018  Technology