Did you know dogs have an excellent sense of smell? The particular bundle of nerves related to a dog's nose is 40 times larger than that of a human being. Their nostrils contain up to 300 million olfactory receptors compared to our measly 5 million. This allows dogs to detect faint odors we cannot even perceive, down to parts per trillion. This amazing sniffing ability helps dogs track scents, find food and detect changes in their owners' health.
The hummingbird is the smallest bird in the world, with the smallest species measuring just 2.25 inches in length. They are also the only birds that can hover in mid-air, and their wings beat up to 80 times per second!
The honey badger is one of the toughest animals in the world. They have thick, tough skin that is almost impervious to bites and stings, and they are known to take on animals much larger than themselves. They are also incredibly intelligent and have been observed using tools, such as sticks, to get food.