#21 Have you ever noticed the whiskers on the backs of a cat's legs? They’re called carpal whiskers:
 
                
                
                
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                #22 This is what an ant's head appears like when viewed extremely closely:
 
                
                
                
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                #23 Frogs can be incredibly, incredibly small:
 
                
                
                
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                #24 This is a photograph of one of the last Tasmanian tigers, a species that vanished in 1936:
 
                
                
                
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                #25 And here is one of the only two Northern white rhinoceroses still alive on the planet:
 
                
                
                
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                #26 This illustrates the size of a newborn kangaroo:
 
                
                
                
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                #27 This is a comparison of a shark's brain and a dolphin's brain:
 
                
                
                
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                #28 This shows a gorilla receiving dental care:
 
                
                
                
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                #29 Gorillas... they're just like us!
 
                
                
                
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                #30 And here is a comparison of a hummingbird egg and an ostrich egg:
 
                
                
                
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                #31 This is a vaquita, one of the rarest species in the world:
 
                
                
                
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                #32 This shows the interior of a wasp nest:
 
                
                
                
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                #33 This is what a python's skeleton looks like:
 
                
                
                
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                #34 This is a Quetzalcoatlus, the largest flying creature ever documented, next to a human:
 
                
                
                
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                #35 This image depicts several fossilized dinosaur eggs:
 
                
                
                
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                #36 Deer lose their antlers annually. This is what a deer without antlers looks like:
 
                
                
                
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                #37 A beluga whale's head consists mainly of fat tissue...
 
                
                
                
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                #38 Here is a baby pigeon:
 
                
                
                
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                #39 Emu eggs are truly stunning:
 
                
                
                
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                #40 Both seals and sea lions possess nails:
 
                
                
                
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