⁉️ Can you hear anything in space?

✅ No, you cannot hear any sounds in near-empty regions of space. Sound travels through the vibration of atoms and molecules in a medium (such as air or water). In space, where there is no air, sound has no way to travel.

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⁉️ Is the femur the longest bone in the body?

✅ The head of the femur articulates with the acetabulum in the pelvic bone forming the hip joint, while the distal part of the femur articulates with the tibia and patella forming the knee joint. By most measures the femur is the strongest bone in the body. The femur is also the longest bone in the body.

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⁉️ What month does winter begin in the southern hemisphere?

✅ Astronomically, it starts with the winter solstice (around December 21 in the Northern Hemisphere and June 21 in the Southern Hemisphere), and ends with the spring equinox (around March 21 in the Northern Hemisphere and September 21 in the Southern Hemisphere).

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⁉️ What mammals can fly?

✅ Bats are the only mammals that are able to fly. The "flying squirrel" can only do what the gliding opposum does -- glide for short distances.

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⁉️ Where are apples indigenous?

✅ The tree originated in Central Asia, where its wild ancestor, Malus sieversii, is still found today. Apples have been grown for thousands of years in Asia and Europe, and were brought to North America by European colonists.

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⁉️ Why do birds bob their heads when they walk?

✅ Most studies also suggest that birds in motion bob their heads to stabilize their visual surroundings. Unlike us, we depend on our eye movements rather than our head movements to hold the images presented to us while in moving. The back and forth movement is not random head bobbing.

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⁉️ What was the fastest wind speed ever recorded?

✅ The fastest wind speed not related to tornadoes ever recorded was during the passage of Tropical Cyclone Olivia on 10 April 1996: an automatic weather station on Barrow Island, Australia, registered a maximum wind gust of 408 km/h (220 kn; 253 mph; 113 m/s).

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⁉️ How many bones are in a dog's body?

✅ Bones, muscles, ligaments and tendons compose the bulk of an animal's body mass. Allowing for variations in tail length, there is an average of 319 bones in the dog skeleton. Bones are complex, rigid, living organs that have their own supply of blood vessels and nerves.

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⁉️ Is natural gas heavier or lighter than air?

✅ Lighter-than-air natural gas (methane) should not be confused with liquefied petroleum gas. This gas is more commonly called L.P., bottle gas, propane, butane and various other trade names. Liquefied petroleum gases are all heavier than air and will collect in low places when not confined.

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⁉️ Which bird is the fastest swimmer?

✅ In flight, the fastest bird is the spine-tailed swift of Siberia which can reach speeds in excess of 100 miles per hour, but the fastest bird in the water is the Gentoo penguin, which swims at about 22 mph. (Watch this video of a Gentoo swimming madly to avoid a pod of hungry orcas.)

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⁉️ How much does mount Everest grow each year?

✅ Readings suggest that Everest grows 0.1576 inches (about four millimeters) each year. Other tectonic forces, however, may cost Everest some of its height.

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⁉️ What makes a primary color?

✅ Start with red, yellow, and blue paint—the primary colors. Use these to make secondary colors. Then make tertiary colors by mixing primary colors with the nearest secondary colors. (For example, you might mix yellow with green to make yellow-green, or yellow with orange to make yellow-orange.)

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⁉️ Is chalk a rock or mineral?

✅ Chalk is a soft, white, porous sedimentary rock, a form of limestone composed of the mineral calcite. Calcite is calcium carbonate or CaCO3.

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⁉️ Is sodium and salt the same thing?

✅ Salt and sodium are not the same thing. "Salt" is the term commonly used for sodium chloride (NaCl) which is table salt. Sodium chloride is just 40% sodium and 60% chloride. One teaspoon of table salt contains 2,325 mg of sodium.

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⁉️ Which animal's eye is bigger than its brain?

✅ Ostrich has the biggest eyes in the whole animal kingdom. Its eye is bigger than its brain. Ostriches don't hide their head in the sand. They will lay their head on the ground if they sense a danger.

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⁉️ What country's language is Farsi?

✅ Western Persian (Persian, Iranian Persian, or Farsi) is spoken in Iran, and by minorities in Iraq and the Persian Gulf states. Eastern Persian (Dari Persian, Afghan Persian, or Dari) is spoken in Afghanistan. Tajiki (Tajik Persian) is spoken in Tajikistan and Uzbekistan.

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⁉️ How long is human gestation from conception?

✅ The average length of human gestation is 280 days, or 40 weeks, from the first day of the woman's last menstrual period. The medical term for the due date is estimated date of confinement (EDC). However, only about four per cent of women actually give birth on their EDC

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⁉️ How old is the oldest tree?

✅ The world's 10 oldest living trees. At 4,841 years old, this ancient bristlecone pine is the oldest known non-clonal organism on Earth. Located in the White Mountains of California, in Inyo National Forest, Methuselah's exact location is kept a close secret in order to protect it from the public.

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