When you pass a magnet over the sand on a beach, you can sometimes see some black grains sticking to it: these grains have a...
Weather satellites orbit the Earth all day long, continuously monitoring the entire planet. From their vantage point hundreds of kilometers above, they regularly capture comprehensive...
Friction is the resistance you feel when two surfaces slide against each other. As smooth as they may seem to you, these surfaces are actually...
Fresh snow is typically that light and fluffy layer we love for skiing, but be careful: precisely because it is light, it often contains a...
Trees produce toxins as a natural shield against external threats, such as hungry insects or invasive fungi. These chemical substances, sometimes very potent, allow trees...
Melanin is the pigment that gives color to our eyes as well as our hair and skin. Basically, the more melanin your eyes contain, the...
The higher you go, the less dense the air is: specifically, you have fewer molecules weighing down above your head. Imagine atmospheric pressure as the...
For a lunar halo to form, small ice crystals must first be suspended in the atmosphere. These crystals appear up there, at an altitude of...
A dilution is the act of adding solvent (usually water) to a solution to decrease its concentration, without changing the actual amount of dissolved substance. In other...
Our planet acts like a giant magnet due to the movements of the earth's core composed mainly of molten iron and nickel. This immense ball...
