How does lack of light affect our body clock? | Horizon

Night flight | Working in the Dark

Flight attendants, night shift and jet lag.

The role of SCN and melatonin | Secrets of the Body Clock with Terry Wogan

Our body clock is explained in terms of the brain, the SCN, the hormone melatonin and the percepti...

Impact of sleeping less | Start the Week

Discussion about sleep erosion over time and the biological and psychological impacts of people sleeping less than our ancestors use...

Beginning of the experiment | Horizon

The experiment begins with Aldo being isolated in a nuclear bunker away from people and outside influences.

How easily do our body clocks keep time? | Horizon

Aldo is trying to keep track of time without any external cues in the bunker.

How does lack of light affect our body clock? | Horizon

Aldo is now living in the bunker with very limited artificial light to see the effects on his body clock.

The impact of jet lag | Horizon

Experimenters are inducing jet lag by waking Aldo up several hours early, what will the impacts be?

The impact of shift work | Horizon

Couples who are struggling with their sleep are helped by a sleep expert.