Science
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Robots Playing Real Tennis Against a Pro
An autonomous humanoid robot rallied over 100 shots against a former top-20 tennis pro — no script, no remote control, just real-time reactions.
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Using Your Brain to Control Someone Else’s Arm
A neuroscientist wires two volunteers together — and one person's clenched fist makes a stranger's arm move.
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The Bicycle That Steers the Wrong Way
An engineer's welder friends build a bicycle that steers backwards—turn left, go right—and dare him to ride it. He expects minutes. It takes eight months!