Every spring, trees, grasses, and various herbs release thousands of tiny grains of pollen into the air for reproduction. This pollen, easily carried by the...
When you dream, your brain is almost as active as when you are awake. Certain regions, particularly the visual cortex, responsible for images, are highly...
Contrary to popular belief, it is not actually the fur itself that causes allergies; it is mainly what clings to it. Cats naturally produce small...
When you drink coffee, caffeine acts directly on your blood vessels. Initially, it usually causes vasoconstriction, meaning it temporarily narrows the blood vessels. But after...
When injecting insulin, it must be delivered precisely subcutaneously, just under the skin. A very fine needle allows for more accurate administration at this level, without penetrating...
Ebola usually enters the body through contact with contaminated biological fluids, such as the blood or saliva of an infected person. Once it penetrates through...
The diaphragm is that large dome-shaped muscle located beneath the lungs. It separates your thorax (where your lungs and heart are) from your abdomen, where...
Human babies naturally produce very high-pitched sounds, reaching very high frequencies and a shrill pitch. Our ears are more sensitive to these high frequencies, which...
Genetics partly explains why women generally live longer. First, it is important to know that women have two X sex chromosomes, while men have only...
Diabetes slowly but surely damages the body. Too much sugar lingering too long in your blood wears down your blood vessels and nerves: this is...
