Science & Mathematics Questions & Answers

If you had seen nothing but cartoons strips, you might think so. But in reality, mice like all rodents, prefer vegetables and grain to cheese, and will only eat it when they are very hungry.

A magnet works on the principal of electromagnetism. Magnetic force is independent of the Earth’s gravitational force. Therefore, a magnet will work in space. As the Earth is also a big magnet with two poles (south and north), it too exerts a force on other astronomical bodies.

Yes, much as adults do, says a West German study at Heidelberg University. Only they cannot assess pain and communicate it. So far, the medical profession had maintained that infants do not have a fully developed nervous system and are therefore unable to sense much pain. Not surprisingly, a 1998 study conducted in the United States showed that only 6.7% …

Well, it’s not exactly singing, but some fish can make musical sounds. The siren fish of the Mediterranean can make a tuneful noise by gratin its teeth together, and the drumfish is so called because it can make a noise like a drum, so loud that fisherman sixty feet above it on the surface have heard it.

Two male Siamese fighting fishes placed in the same aquarium instantly take up aggressive positions ready for a scrap. Their colours deepen, their long flowing fins becomes erect and they suddenly slash at one another at lightning speed. The fight is very dramatic and can last for up to an hour before one of the pair becomes too exhausted or …

Experts studying different human populations are very interested in the distribution of blood groups. For example, it has been noted that Amerindians (American Indians) are practically always blood group O. There are very few pure Amerindians with blood group A, and group B is conspicuous by its absence. Asiatics have far more member of group B than Europeans Among Europeans, …

No. There are 230 joints in the body and all play their part in allowing the skeleton to maintain its shape and, in some case, to move. Some of the body’s joints, however, do not move at all the cranial bones of the skull, for example. Other joints, such as the elbow joint, allow movement in one direction only.

The first submarine to go into action was an American vessel called the Turtle. It tried to attack a British warship in 1776, during the American War of Independence. The Turtle was an egg-shaped craft powered by one man, who sat inside and turned two handles connected to screw propellers outside. Manned by Sergeant Ezra Lee, the Turtle’s mission was …

The answer, in the modern use of the world flag, is ‘no’. The world is of Germanic origin and was used in the fifteenth and sixteenth centuries to mean a piece of cloth, or other material, displaying the insignia of a community or armed force, an office, or an individual. They were used originally mainly in warfare, and were signs …

Surgeons can cut tissues without using knives. They use a laser beam which delivers intense heat to the tissue. The beam cuts effortlessly and with total cleanliness. It also seals blood vessels so that the cut does not bleed. Eye surgery can also be carried out by laser-without cutting open the eye! The retina at the back of the eye …