All engine running.

running.

Absolutely genius.

Welcome.

It's the show where we bring you science.

What that essentially means is discovery is

advances, research, technology, unbelievable.

Without further ado, this is the naked scientist.

Hello, welcome to the naked scientist, the show where we bring the latest breakthroughs in science, technology, our medicine with me Chris Smith.

Today, is it time to consider ditching clock changes? We chart the history, the rationale,

and the adverse impacts on our health of daylight saving.

Now it's that time of year where many of us in the Northern Hemisphere prepare to

scurry around our home setting our non-digital clocks back an hour to reflect

the end of daylight saving time and the arrival unfortunately of winter.

Changing the clocks in this way as we'll find out a bit later on is a relatively new phenomenon

though and it's one that's dictated by national governments.

But day and night, however, is a consequence of nature and the earth's tilt on its axis.

But how does it work?

Well I popped along to visit Mike Bothwell, who is the University of Cambridge's public

astronomer at the Institute of Astronomy.

Our planet is spinning. We spin once every 24 hours. The sun shines on one side of the planet and that gets daytime,

the night side of the planet, on the other side from the sun is nighttime, and then every 24

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