You're about to listen to a BBC podcast and maybe it's when I had a hand in.

I'm Tammy Walker and I produce podcasts for the BBC.

My role is to give new and diverse creators a voice with the opportunity to build a career.

That's the thing I love about podcasts.

You start with just a good idea, but then you have the space to see where it goes.

And doing that at the BBC means we can really run with the best stories

while developing the most unique audio talent.

So if you like what you hear, why not check out the huge range of podcast we've got on BBC

Sounds? Are I going in the right direction? So if you lose the scent trail then see if you can sniff it out again.

This is crowd science from the BBC World Service and this is me

Nasrantavakolifar channeling my inner sniffer dog in the name of science.

I pick it up right here.

I'm blindfolded, my ears are blocked, and I'm wearing thick gloves and clothes relying only on my dubious sense of smell

to follow the trail of a 10 metre long orange-scented string.

Am I on it or near it?

I'm not allowed to say, this is science. science yeah but I don't know what I'm doing you

you're doing great try to get back to the I smell right here I think I have to say I don't think you're going to give a sniffer dog a run for their money.

So why on earth am I crawling along the ground in the depths of a freezing cold winter?

Well on crowd science we go to the greatest length. in the depths of a freezing cold winter?

Well, on Crowd Science we go to the greatest lengths

to answer your science questions.

And my producer Kathy decided to send me on this mission

...