Why two nostrils?

[AndiFlatland]

Why are our noses divided into 2 nostrils? I appreciate that we hear and see with 2 ears / eyes, because the stereo images received give us a sense of position and distance - but there would seem to be no need to smell in stereo. Isn't one nostril enough?

[ummmm]

Symmetry...

[Booldawg]

In case one gets blocked!

[bibblebub]

just imagine how bad it could be with a heavy cold...

[ummmm]

I was thinking that but loads of people have both nostrils blocked.

[beejay1124]

it is to suit the size of your fingers

[Eve]

http://scienceray.com...we-have-two-nostrils/

[snags]

Daniella Westbrook only has one... sniff...

[4getmenot]

you only breath out of one nostril at a time though, it changes side every 20 seconds

[tamborine]

when one is blocked, you can use t'other

[4getmenot]

so when both are blocked?

[tamborine]

try your ears or rearrange letters of 3rd word

[4getmenot]

he he

[joko]

i read some where something like one will deliberately block a bit, then the other one will amd it alernates...cant remeber the reason though...