Something that is interesting and maybe you didn't know. Part 2

Nitroglycerin has medical uses?

Besides being a powerful explosive, in small doses is used to prevent angina pain and to treat congestive heart failure or heart attacks. Its function is to relax the blood vessels to the heart and thus increase blood flow and oxygen supply to the muscle. The nitro glycerin was created by Italian chemist Ascanio Sobrero in 1874, but seeing it as a dangerous invention due to their volatility, he kept a secret for a year. The compound later became the key to the production ingredientte of dynamite, that is 40% 60% nitroglycerin and nitrocellulose, according to the formula of Alfred Nobel.

Why do cocks crow at dawn?

Being territorial birds, roosters show their power through the swagger, the greater crested coloration and powerful song, especially if they see another male harassing one of his wives. In the chicken farm, the rooster uses its internal clock to know that dawn is approaching and it's time to find food and protect their territory as a dominant male. For this reason it is rare to find several males in the same roost, unless there are enough chickens to go around.