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A robot cheetah now runs 45 km/h, faster than Usain Bolt's top speed. It's not the strangest one. A robot spider skeleton comes off a 3D printer. 26 servo motors. $1,385 with skin, $250 without. A robot manta ray took 2 years and 40 fin designs before Singapore researchers landed on flexible PVC pectoral fins. It swims at twice its body length per second. 10 hours underwater before it needs to surface. A robot dragonfly from Germany weighs 175 grams. 27-inch wingspan. Flies forward, backward, sideways, hovers, just like the real thing. Boston Dynamics built a dog that carries 500 kg and hits 25 km/h. It can open doors on its own. A 6-legged crab robot drops 200 meters underwater on 30 joints and grips objects with its front claws. A robotic kangaroo weighs 7 kg and jumps 80 cm, recycling the energy from each landing into the next leap. An AI puppy remembers what earns praise and repeats it. Eyes are screens. $2,899. None of these were built to look pretty. They were built because evolution already solved the problem first.