Animals have 4 senses that humans don’t have

Radar guns, magnetic compasses, and infrared detectors are man-made inventions that allow humans to transcend the five natural senses of sight, taste, smell, feeling, and hearing. But these gadgets are far from original. Millions of years before humans evolved, some animals had these "extra" senses.

Infrared and UV Vision

Like most other vertebrates, rattlesnakes and other rattlesnakes use their eyes to see during the day. But at night, these reptiles use infrared sense organs to detect and hunt warm-blooded prey that would otherwise be completely invisible. These infrared "eyes" are cup-shaped structures that form a rough image when infrared radiation hits the heat-sensitive retina. Some animals, including hawks, hedgehogs and shrimps, can also see into the lower regions of the ultraviolet spectrum. Humans cannot see infrared or ultraviolet light with the naked eye.

Echolocation

Toothed whales (a family of marine mammals that includes dolphins), bats, and some shrews that live on the ground and in trees use echolocation to navigate their surroundings. The animals emit high-frequency sound pulses, either very high-pitched to the human ear or completely inaudible, and then detect the echoes produced by these sounds. Special ear and brain adaptations allow these animals to construct three-dimensional images of their surroundings. Bats, for example, have large ear flaps that collect sound and direct it to their thin, ultra-sensitive eardrums.

Inductor

The ubiquitous electric fields generated by some animals act like senses. Electric eels and some rays have modified muscle cells that generate an electrical charge strong enough to shock and sometimes kill their prey. Other fish, including many sharks, use weaker electric fields to help them navigate murky waters, track prey, or monitor their surroundings. For example, bony fish (and some frogs) have "lateral lines" on each side of their bodies, rows of sensory holes in their skin that detect electrical currents in the water.

Magnetic Sense

The flow of molten material in the Earth's core and the flow of ions in the Earth's atmosphere create the magnetic field that surrounds the Earth. Just as a compass points humans to the magnetic North Pole, animals with magnetic senses can orient themselves in specific directions and travel long distances. Behavioral studies have shown that animals as diverse as bees, sharks, turtles, rays, homing pigeons, migratory birds, tuna, and salmon have magnetic senses. Unfortunately, the details about how these animals actually sense the Earth's magnetic field are unclear. One clue might be the presence of small deposits of magnetite in the nervous systems of these animals. These magnet-like crystals align with the Earth's magnetic field and may function like miniature compass needles.  

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