Summary
Neutrinos interact so weakly with matter that most pass through Earth without leaving a trace. Trillions may pass through your body every second.
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Summary
Neutrinos interact so weakly with matter that most pass through Earth without leaving a trace. Trillions may pass through your body every second.
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.
The Sun you see is about 8 minutes old. If the Sun vanished instantly, Earth would not notice for about 8 minutes.
Most of the universe may be invisible: dark matter emits no light, yet gives itself away through gravity. Galaxy rotation and lensing hint at an unseen ‘skeleton.’
Silkworms feed on an amount equal to 86,000 times their own weight in 56 days. During this process, their bodies undergo an incredible transformation!
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 day on the planet Venus lasts 243 Earth days, while it completes its orbit around the Sun in 225 days.
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