成人快手

Weathering the Storm - floods

The third in a series on the world's extreme weather looks at the impact of floods

• 22 mins

Weathering the Storm - snow and avalanches

An avalanche is a large mass of snow, which plunges down a mountainside

• 22 mins

Deep Impact - Ghana

Lake Bosumtwi is the largest natural lake in Ghana, it was created by a meteorite

• 22 mins

Lifespan - slowing the ageing process

The way creatures age and a look at whether lifespans can be extended

• 22 mins

Lifespan - a matter of life and death

Investigation into the diversity of creatures' lifespans, including the Sequoia tree

• 22 mins

The Moon

The origins of the moon - and how essential it has been to the evolution of life

• 22 mins

Life Cycles - the rhythm of life

Our heart beats, therefore we are

• 24 mins

Life Cycles - daily routine

Humans, animals, plants, even bacteria run their lives according to the passing of the day

• 22 mins

Life Cycles - time and health

How working against the body's natural body clock can cause problems

• 22 mins

World Aids Day

Journalist Hassan Arouni presents a special World Aids day programme from Malawi

• 22 mins

Inflammation - pain or panacea?

Inflammation is our body's defence against infection, but how can it be controlled?

• 22 mins

Influenza - waiting for a pandemic

Experts discuss and agree on how an influenza pandemic is imminent

• 22 mins

The Adventures of William Beebe

Exploring the exploits of the explorer and naturalist, William Beebe

• 22 mins

Cassini-Huygens Probe - running rings around Saturn

A report on the progress of one of the most ambitious interplanetary probes of our time

• 22 mins

Ionic liquids

A look at the potential of ionic liquids

• 22 mins

Cassini-Huygens - visiting Titan

The Cassini-Huygens spacecraft has been orbiting Saturn for the past six months

• 22 mins

Herbs, pills and potions - part one

A series of programmes looking the roots of medicine

• 22 mins

Herbs, pills and potions - part two

Second in a series of programmes on the origins of medicine

• 22 mins

Hair - what is it good for?

Why we have hair, and how hairstyles can change the way we are perceived

• 22 mins

Ocean Blues - history of decline

How different is the abundance of life in the seas today?

• 22 mins

Ocean Blues - coral reefs

A four-part series looking at the health of the world's oceans

• 22 mins

Ocean Blues - noise pollution

Is man-made noise in oceans putting marine mammals in peril?

• 22 mins

Ocean Blues - acidification

What will be the impact of increasing carbon dioxide on life in the oceans

• 22 mins

China - the scientific revolution

How China is once again establishing itself as a pioneering scientific force

• 22 mins

China - stem cell research

Geoff Watts travels to China to explore stem cell research

• 22 mins

China - Clean Energy

Can clean and renewable energy sources help solve China's burgeoning energy crisis?

• 22 mins

China - genetically modified food

Geoff Watts explores China's attitudes to genetic modification

• 22 mins

In Einstein's shadow - general relativity

A series of programmes on the work of Albert Einstein

• 22 mins

In Einstein's shadow - special relativity

A series of programmes on the work of Albert Einstein

• 22 mins

In Einstein's Shadow - quantum theory

A series of programmes on the work of Albert Einstein

• 22 mins