Andrew Peach

So these people, as I was saying, were a little different to chimpanzees who also used tools, but for some reason didn't.

didn't develop a way of creating sharp tools and using them.

So these tools enabled these humans to survive because the geological survey also shows that the climate varied wildly at the beginning of that 2.75 million years.

It was lovely.

It was green and moist and

a lovely place to live.

But then it became a desert.

But because they had these tools, they could acquire food, whereas in the past they wouldn't.

Under normal circumstances, they would have had to evolve or move away.

But what these tools meant was that they were able to control the world around them rather than the world around them control them.

Our science correspondent, Pallab Ghosh, with me.

In 1973, Billie Jean King made tennis history by winning a challenge match against a male former Wimbledon champion called Bobby Riggs.

What was known as the Battle of the Sexes was watched by a global TV audience of nearly 100 million people and is credited with improving the credibility of the women's game.

Now an attempt is being made to recast the tennis battle of the sexes.

A match is planned for later this year in the United Arab Emirates between the women's top-ranked player and a man ranked 652nd in the world.

Jonathan Yureko told my colleague Paul Henley about it.

The two players are Irina Sabalenka, who is the women's world number one and a four-time Grand Slam champion.

And on the opposite side of the net will be Nick Kyrgios, who is a controversial and polarising Australian player who, listeners will remember, reached the Wimbledon final a few years ago, but has been beset by injuries since.

It doesn't sound a particularly evenly matched match.

No, at this stage, we don't know what the format will be.