Beneath the Hawaiian archipelago, there is what we call a hotspot, a kind of deep chimney that rises directly from the mantle, far below the...
At the center of the Earth, it is very hot. All this heat mainly comes from the radioactive decay of certain elements and the residual...
A rainbow forms due to the reflection and refraction of light in water droplets suspended in the air. When light enters a droplet, its colors...
The Earth's magnetic field is a kind of gigantic invisible magnet that surrounds our planet. It is roughly similar to the field generated by a...
The algae that live in the depths possess special pigments, different from the classic chlorophyll green that you see at the surface. These alternative pigments, such as...
At high altitude, air density gradually decreases. The fewer air molecules there are, the less sound absorption there is. At low altitude, sound waves frequently...
Neanderthals likely chose flowers thoughtfully. For example, some archaeological discoveries show the presence of plants with medicinal or fragrant properties in graves. This suggests that...
Low sounds have a longer wavelength, meaning a greater distance between two successive peaks of the sound wave. In contrast, high sounds have shorter wavelengths. Since long...
The radars used by the police exploit the Doppler-Fizeau effect, a rather clever physical phenomenon: when a radar wave bounces off a moving car, its...
Some plants have developed special pigments to take advantage of the slightest amount of available light. Among these pigments, chlorophyll b is particularly notable, as...
