Scientists are rethinking how this extinct creature used the spiky limbs sticking out of its face to hunt.
With layers that work like polar bears’ skin and fur, a material absorbs light and keeps it from escaping.
Alka-Seltzer tablets fizzle furiously when dropped into water. Can you make Alka-Seltzer fizz faster or more loudly by changing the water’s temperature?
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The shapes can form an infinite tiled pattern that never repeats. The first is a 13-sided shape nicknamed “the hat.”