Animals have a much stronger sense of smell than humans do. This is due to a number of factors, including the fact that animals have a larger olfactory bulb (the part of the brain that processes smells) and more olfactory receptors (the cells that detect smells). In addition, animals' olfactory organs are located in a more advantageous position on their heads, which allows them to better sample the air around them.

As a result of their superior sense of smell, animals are able to detect and discriminate between a much wider range of smells than humans can. This is important for a number of reasons, including finding food, avoiding predators, and finding mates.

Here are some examples of how animals use their sense of smell to their advantage:

* Dogs: Dogs have an incredible sense of smell that they use for a variety of purposes, including tracking down prey, detecting drugs and explosives, and finding lost people.

* Cats: Cats use their sense of smell to mark their territory, identify other cats, and find food.

* Bears: Bears have a strong sense of smell that they use to find food, such as berries and fish.

* Elephants: Elephants use their trunks to smell their food and water, and to communicate with other elephants.

* Whales and dolphins: Whales and dolphins use their sense of smell to navigate, find food, and communicate with each other.

In addition to their superior sense of smell, animals also have a number of other advantages over humans when it comes to sniffing complex smells. For example, animals have a much faster rate of sniffing than humans, which allows them to collect more information about their environment in a shorter amount of time. Animals also have a wider range of sniffing behaviors, which allows them to better sample the air around them.

As a result of these advantages, animals are much better at sniffing complex smells than humans are. This is an important survival skill for animals, as it allows them to find food, avoid predators, and find mates.