We run it on QI a few years ago. Yeah. Which was there's no such thing as a fish.

And it's not such thing as a fish. No seriously it's in the Oxford Dixbury of Underwater life.

He says it right up first paragraph. No such thing as a fish.

Hello and welcome to another episode of No Such Thing as a Fish, a weekly podcast coming to you

from the QI offices in Covern Garden. My name is Dan Triber. I'm sitting here with

Anagesinsky, James Harkin and Andy Murray and once again we've gathered around the table with

our four favourite facts from the last seven days and here they are in no particular order.

Okay, back number one James. Okay my fact this week is that Comets stink. How could you know that?

So the Rosetta probe which we all know is currently going around the comet and during that they've

managed to collect some data from the comet itself. They've managed to do some special analysis

on the molecules and they found out that it smells like a mixture of rotten eggs,

cat urine and bitter almonds. Yeah me although did we talk about the fact that cat urine is good

if you smell it in wine. Oh you know. So if that could be distilled into wine. What do you mean if you

smell it in wine? It's like a wine flavour. Wine is a big thing. I'd say or it has a cat pee aroma

not as a bad thing. Oh okay. Yeah. A cat pee I guess is like ammonia isn't it? That's the kind of

smell but the chemicals that they have on this comet are hydrogen sulfide, ammonia, hydrogen cyanide

for maldehyde, methanol and sulfur dioxide and that apparently gives those smells. I really like

the science writers who received that kind of slightly dry. Some people would say report from Rosetta

and go so I've read this list of chemicals. Do you think we can do the headline comet stinks?

Yeah let's go there. Yeah fine. It does overstate it a bit because actually if you were on

the comet you wouldn't be able to smell it because the molecules are just not numerous enough for

your nose to detect them. If you had a sniff of dog they'd be able to detect it. Dogs can smell

...