Two tiny robots may be the smallest, lightest, and fastest fully functional micro-robots ever created, researchers report.

A new boot-like robotic exoskeleton that increases walking speed and reduces effort has made its untethered debut outside the lab and into the real world.

A new path planning algorithm gives rescue robots that use their arms to make their way across treacherous terrain such as disaster areas a speed upgrade.

When it comes to Olympic-caliber swimming pools, everything—air flow, depth, and more—are in place with speed in mind, Jud Ready explains.

Mantis shrimp start life as ferocious predators who know how to throw an ultra-fast lethal punch—even when they're smaller than a grain of rice.

A new ankle exoskeleton increases users' walking speed by about 40%. Researchers hope it will one day help restore walking speed for older adults.

Birds can learn to recognize fast and flashy butterflies they've failed to catch in the past—as well as similar-looking species—research finds.

The slingshot spider can launch itself at pray with a velocity of more than 13 feet per second. Unsuspecting mosquitoes don't stand a chance.

A new kind of soft robot gets its moves from jellyfish. But the robots can outpace the real-life ocean animals by a fair bit.

Smaller dinosaurs needed speed, but huge predators like Tyrannosaurus rex relied less on moving fast and more on energy-efficient walking.