09/06/2014 Newsround

Hi, guys, Ricky here, with news of a dramatic rescue on the way.

Plus, why rats are more like us than we thought.

First to a major rescue attempt to save a climber trapped in Germany's

deepest cave:

hundreds of people are trying to reach the man, who's

a thousand metres below ground.

He was injured after rocks fell on him while he was walking

in mountains with friends.

Another man managed to climb out to get help,

but that took him 12 hours.

They're currently trying to get a doctor

into the cave to treat the man.

Next to a scientific breakthrough that could show that rats are more

like us than we might have thought:

a new study claims they experience regret,

something that was always thought to be uniquely human - until now.

Hmmm, what to have?

The salad or the burger?

The burger looks good, but I don't have much time.

I've got to get back to work.

You know what?

I'll go for the salad.

The feeling when you regret something - it's when you make

a decision and then afterwards realise you've made a bad choice.

Up until recently, scientists believed only humans were

able to experience regret.

But then researchers in Minnesota in America ran this test.

Scientists used treats to entice rats into a food station,

where they could either wait for their favourite meal or go to

the next stop, where another treat was ready immediately.

The rats who just couldn't wait showed they regretted their decision

by turning around and looking back at what they could have had.

They called this a regret-inducing situation.

Regret is an incredibly useful emotion to be able to learn to do

the right things in the future.

What's exciting for us as scientists in this case is that by being able

to look at these emotions in rats, it means that we can also look into

the brain in a very fine scale.

The study also showed that rats, like humans,

have different tastes in food.

For example, one rat would happily wait 20 seconds

for a cherry treat but wouldn't wait that long for a chocolate treat.

Scientists hope this will help us learn more about our own decision

making and how our brains react.

Hm, do you know what?

I should have gone for the burger.

But actually, hang on, is that lasagne?

Prince William has joined forces with David Beckham to try to stop

illegal wildlife poaching around the world.

Wills has launched a new campaign today to try and stop critically

endangered animals like rhino, elephants and tigers being hunted.

Becks, who worked with the Duke on England's 2018 World Cup bid,

has backed the plan.

Finally, if you've ever wondered what a polar bear gets up to

every day, then watch this.

These pics were taken from a special camera attached to

this bear's collar in Alaska, USA.

They show the bear swimming and chatting up potential mates.

Researchers hope it will help them understand how polar bears

cope with changing conditions.

Newsround is back tomorrow morning with Jenny.