Take some time for yourself with soothing classical music from the mindful mix, the Science of

Happiness Podcast.

For the last 20 years I've dedicated my career to exploring the science of living a happier more meaningful life and I want

to share that science with you.

And just one thing, deep calm with Michael Mosley.

I want to help you tap in to your hidden relaxation response system and open the door to that

calmer place within. Listen on BBC Sounds.

Hello I'm Marnie Chesterton, and this is Crowd Science on the BBC World Service, the show that takes the thing you've always wondered about, life, death, tiny subatomic particles to massive multiverses and gets you the answers. Think of us as an audio Google search, only

much, much better. Today we're answering not one but three of your questions,

gathered from as far afield as Texas,

via Peru and Austria,

to Wodonga in Australia, to Burton-on Trent in the UK. Later I'll be on the west coast of Scotland

finding out why the water is so not as cold as it's supposed to be and in a moment

I'll be taking my taste buds to some unpleasant places for science.

That is not a good face.

Now I don't want to put this in my mouth, haven't it?

Okay, all right, right, bottoms up.

And why do human faces all look so different? We'll be probing the advantages of our facial uniqueness.

You have a doppel ganger out there and you're actually a hot shot, you might lose lose out meetings based on the fact that you have

some look-alike running around stealing your opportunities.

But first up, we have a matter of taste.

For several thousand years, everything we've tasted has fallen into four categories, sweet,

...