The square root of 49 is 7 because 7 multiplied by itself equals 49. The square root of a number is always positive, so -7 is not a valid answer, even though -7 multiplied by -7 also equals 49.

Nitrogen fixation is the process by which certain plants, such as legumes, house nitrogen-fixing bacteria in special structures called nodules on their roots. These bacteria convert atmospheric nitrogen (N2) into ammonia (NH3), which can be used by the plant for growth. This is a key part of the nitrogen cycle and helps enrich the soil with nitrogen, reducing the need for artificial fertilizers.

"Guernica" is a powerful political statement, painted as an immediate reaction to the Nazi's devastating casual bombing practice on the Basque town of Guernica during the Spanish Civil War. Picasso completed the painting by June 1937, and it has since become an anti-war symbol and an embodiment of peace.

HTTP, which stands for Hypertext Transfer Protocol, is the underlying protocol used by the World Wide Web to define how messages are formatted and transmitted, and what actions web servers and browsers should take in response to various commands.

SpongeBob SquarePants is an animated character who lives in a pineapple house in the underwater city of Bikini Bottom. He works as a fry cook at the Krusty Krab restaurant and is known for his optimistic and cheerful personality.

Retinal detachment occurs when the retina separates from the back of the eye, causing sudden vision loss or the appearance of dark floaters in one's visual field. It is considered a medical emergency requiring prompt treatment to prevent permanent vision loss in the affected eye. Risk factors include severe nearsightedness, previous eye surgery, and eye injuries.

Russia is the world's largest country by land area, spanning 11 time zones from Kaliningrad in the west to the Kamchatka Peninsula in the east. This means when it's 12 noon in Kaliningrad, it's already 11 PM in Petropavlovsk-Kamchatsky.

Kim Kardashian was born in Los Angeles, California in 1980. She first gained media attention as a friend and stylist of Paris Hilton, but received wider notice after the release of her sex tape in 2007.

The typical life cycle of corn is about 125 days from seed to harvest. Corn is usually ready for harvest around 20 days after the silk first appears on the ear.

The "Chronicles of Narnia" is a series of seven fantasy novels written by British author C. S. Lewis. The books have sold over 100 million copies and have been adapted into various films and television shows.