'Even-Toed' Ungulates Are a Diverse Group, Including Camels and Deer.
These mammals, belonging to the order Artiodactyla, bear weight equally on two (or four) toes, unlike odd-toed ungulates (Perissodactyla) which bear weight on one or three toes.
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Some Female Snakes Can Reproduce Without a Male Through Parthenogenesis
Several snake species including boa constrictors and copperheads are capable of facultative parthenogenesis — producing offspring without fertilization. Female snakes can do this when isolated, essentially cloning themselves, though offspring have reduced genetic diversity.
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Rattlesnake Rattles Are Made of Interlocking Hollow Keratin Rings
Each time a rattlesnake sheds its skin, a new hollow keratin segment is added to the rattle. The segments interlock but are not attached, so they knock together to produce the distinctive sound. A new snake grows one segment per shed.
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The Smallest Snake in the World Is Shorter Than a Pencil
Tetracheilostoma carlae, the Barbados threadsnake, is the world's smallest known snake at just 10 cm long and as thin as a strand of spaghetti. It was only discovered in 2008 and feeds exclusively on termite and ant larvae.
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Snakes Can Detect Earthquakes Before They Happen
China's earthquake bureau has monitored snake behavior since 2006, finding that snakes leave their burrows and behave erratically up to five days before a quake. They can detect seismic vibrations at distances of 120 km.