Tag: science & technology

Botany is the branch of biology that studies plants, including their structure, growth, reproduction, metabolism, diseases, and classification. Entomology studies insects, zoology covers animals, and anthropology focuses on humans.

Sputnik 1 was the first artificial satellite, launched by the Soviet Union on October 4, 1957. Aryabhatta and Bhaskara were Indian satellites launched much later (1975 and 1979), and Rohini was also an Indian satellite (1980s).

Sharks have skeletons made entirely of cartilage rather than bone. Cartilage is lighter and more flexible than bone, which helps sharks swim efficiently. This is why they are classified as cartilaginous fish along with rays and skates.

Nitrogen makes up about 78% of Earth's atmosphere by volume, making it the most abundant gas. Oxygen is second at about 21%, followed by argon at 0.93%. Carbon dioxide and hydrogen exist only in trace amounts (0.04% and negligible).

Saturn is the second largest planet in our solar system after Jupiter. It is a gas giant with a diameter approximately 9.5 times that of Earth. Neptune is smaller than Saturn despite being located farther from the Sun.

Bees have two pairs of wings (four wings total). The forewings and hindwings hook together during flight to function as a single surface, providing excellent maneuverability.

Iron is the most abundant metal in Earth's crust, constituting about 5% of its mass. Aluminium is actually the most abundant metal overall when considering the entire Earth, but iron dominates in the crust where we can access it. The question refers to crustal abundance.

Laszlo Biro and his brother Gyorgy invented the modern ballpoint pen. Their design used a tiny ball that rolled in a socket, distributing ink smoothly. The Biro brothers' patent revolutionized writing instruments.

John Boyd Dunlop invented the pneumatic rubber tire in 1888. He developed it to provide a smoother ride for his son's tricycle, and his invention revolutionized transportation by making bicycles and automobiles more comfortable.

Marie Curie, along with her husband Pierre, discovered radium in 1898. She was a pioneering physicist and chemist who conducted groundbreaking research on radioactivity, becoming the first woman to win a Nobel Prize.