As you may have noticed, your dog probably treats each walk as an adventure-packed expedition through the Amazonian wilds. What’s up with the constant sniffing of every patch of sidewalk, tuft of grass, and length of stop sign? Learn more on this Moment of Science.
Why do snakes have forked tongues and why do they flick them? Learn more on this Moment of Science.
Do fish have olfactory senses? How do they smell without a "nose?" Find out on this Moment of Science.
Why do humans have two nostrils? Find out on this Moment of Science.
When we imagine a rose, why do we sniff out loud to smell it?
Ever wonder where dirt gets that fresh smell? Find out on this Moment of Science.
Sewage stinks. But did you know that bacteria can make it smell better?
Ever wonder why rotten fish smell worse than beef? Find out on today's Moment of Science.
Things like coffee grounds and charcoal are called “physical deodorizers,” because they absorb tiny particles in the air that are causing the smell. The problem is, eventually they reach a state called “equilibrium,” in which the deodorizer has absorbed all it can.