Under active volcanoes, magma gases rich in sulfur compounds such as sulfur dioxide (SO₂) or hydrogen sulfide (H₂S) rise to the surface. When these gases...
When waves travel in deep water, they move without being really hindered, as the depths are often very deep. The wave transfers its energy without...
At high altitude, there is not "less air" as one might sometimes hear, but the air is simply less dense. This means that the air...
You have probably noticed that water forms nice round drops on some leaves rather than spreading out. This phenomenon is mainly explained by the surface...
Cetaceans, such as dolphins or whales, possess a very sophisticated echolocation system to navigate in the water, using sounds and their echoes to map their...
Children have young ears with intact and fresh hair cells. These tiny cells, located in the cochlea, allow for the perception of a wide range...
Our brain manages reality by interpreting what our eyes see. Sometimes, it tries to make sense where there isn't really any, creating an apparent movement. This phenomenon...
The colors of the northern lights mainly come from the different gases present in our atmosphere. Oxygen is largely responsible for those famous green and...
Some berries contain specific chemical compounds called alkaloids, glycosides, or saponins, several of which are toxic to humans. These substances have often evolved as a...
Carrots are orange mainly due to a natural pigment called beta-carotene. This belongs to the family of carotenoids, which also give fruits like apricots and...
