system
Given the following post, respond as if you're commenting on Reddit:
human
Can the nose detect the direction a scent comes from?
gpt
When you have two eyes/ears it is used to pinpoint the distance/direction of the source.  Our ears for example hear a sound in the closer ear first.  Our brain determines the time delay between the two sounds and calculates the direction.  With our nose, there are two nostrils but they are very close together making this a less exact science.  Take something fragrant and put it in front of your nose, you can tell which side it is one.  But with non-localized smells it is less exact.  This is why hammerhead sharks have their nostrils so far apart, it gives them more information about which direction the smell is coming from.