Summary
We assume heat always expands things, but some alloys can do the opposite in certain ranges. Tiny shifts in crystal structure can make length shrink as temperature rises.
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Summary
We assume heat always expands things, but some alloys can do the opposite in certain ranges. Tiny shifts in crystal structure can make length shrink as temperature rises.
Cats spend almost half of the day sleeping. This makes them one of the sleepiest pets.
Every day, 12 newborn babies are given to the wrong families. This situation can have serious consequences for both the families and the babies.
Mantis shrimp can distinguish light in unusual ways using many photoreceptor types. Unlike our three-channel color system, it uses a more segmented spectral sampling.
The helium that lifts balloons is a ‘leaky’ gas for the planet. Being so light, it rises high, and some atoms gain enough speed to escape into space—Earth slowly loses it.
A barrier impossible in classical terms can be crossed with a small quantum probability. This matters from atomic scale devices to modern electronics.
Explosions in space movies are loud, but in reality sound cannot propagate in vacuum. Sound needs a medium to carry vibrations, and space lacks it.
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