Ice cubes float. This is so ordinary that it takes a moment to see anything strange in it.
Consider what floating means. An object floats when it is less dense…
Soap is one of the oldest manufactured substances and one of the most consequential, and almost nobody can explain what it does.
The common assumption is that soap is a…
The fossil record is overwhelmingly a record of hard parts.
Bones, teeth and shells survive because they are mineral to begin with. Everything else — muscle, skin, fur, feathers, gut…
Source: Wikipedia
Anyone who has left a tool in the garden knows what happens to iron. A gate goes orange, a railing flakes, and given a few seasons the metal is…
There is a security feature in almost everyone's pocket that has been doing its job for over three hundred years, and almost nobody knows what it is for.
Look at…
Almost every unit of time you use is a measurement of something physical.
The day is the Earth turning once. The month is roughly the Moon going through its phases.…