In its chemical composition, saltwater mainly contains sodium chloride, better known as table salt. But it also contains other dissolved minerals such as magnesium, calcium, potassium, and...
When you speak, your skull transmits part of the sound directly into your ears through bone conduction. This enriches your voice with low frequencies, giving...
During the Cretaceous period, the Earth experienced a sudden change in climate: global temperatures plummeted, oceans became colder, and sea levels dropped. It may not...
Lemons simply fall because our planet exerts an attraction on all objects nearby: that’s what gravity is. It’s as if the Earth pulls everything toward...
All matter around us is made up of atoms, which themselves consist of a central nucleus surrounded by small particles called electrons. Generally, the number...
At high altitude, the air becomes quite thin and its pressure drops, which significantly reduces the amount of oxygen available. Our lungs struggle to capture...
Our eyes are naturally drawn to bright surfaces due to the phenomenon of visual contrast. The brain almost instinctively detects the difference between a bright...
When you add an ice cube to your drink, there is necessarily a transfer of heat, from the liquid (hotter) to the ice cube (colder). It’s a...
For several decades, average surface temperatures on Earth have been rising slowly but surely. The main cause is the increase in greenhouse gases in the...
Cold greatly slows down or even sometimes completely stops the growth of microorganisms like bacteria and yeasts. Why? Simply because these little creatures need warmth...
