Here’s a collection of interesting100 facts about science

Physics & Space

1. The speed of light in a vacuum is approximately 299,792 kilometers per second.
2. A black hole’s gravitational pull is so strong that not even light can escape it.
3. There are more stars in the universe than grains of sand on all the Earth’s beaches.
4. The largest planet in our solar system is Jupiter.
5. One teaspoon of a neutron star would weigh about 6 billion tons on Earth.
6. Space is completely silent because there’s no air for sound to travel through.
7. The Milky Way galaxy is about 100,000 light years in diameter.
8. The concept of “dark matter” refers to mysterious matter that doesn’t emit light or energy, but has mass and gravity.
9. The Sun is 400 times larger than the Moon but 400 times farther away from Earth, making them appear the same size in the sky.
10. Time slows down the closer you get to the speed of light, a phenomenon known as time dilation.
11. The largest known star is UY Scuti, which is over 1,700 times the size of the Sun.
12. The first man-made object to leave the Solar System was the Voyager 1 spacecraft.
13. There are supermassive black holes at the centers of most large galaxies, including ours.
14. Light from the Sun takes about 8 minutes and 20 seconds to reach Earth.
15. Neutrinos, which are subatomic particles, can pass through the entire Earth without interacting with matter.

Chemistry

16. Water is a compound made of two hydrogen atoms and one oxygen atom (H2O).
17. The periodic table contains over 100 elements.
18. Gold is so dense that a single cubic inch weighs about 19.3 grams.
19. The most abundant element in the Earth’s crust is oxygen.
20. Helium is the second lightest element in the periodic table and is used in balloons.
21. The human body contains about 60% water by weight.
22. A diamond is made entirely of carbon atoms arranged in a crystal lattice.
23. Acids have a pH below 7, while bases have a pH above 7.
24. Oxygen is necessary for respiration and is used by humans to produce energy from food.
25. The element with the highest atomic number naturally occurring on Earth is uranium (U).
26. Salt (sodium chloride) is composed of sodium (Na) and chlorine (Cl) ions.
27. The process of rusting is a chemical reaction involving oxygen and iron.
28. Chlorine is a poisonous gas at room temperature but is a key element in disinfectants.
29. The largest single molecule ever discovered is a protein called Titin.
30. Carbon can form more compounds than any other element.

Biology & Medicine

31. The human body has about 37.2 trillion cells.
32. The average adult human body is made up of around 60% water.
33. Your DNA is about 99.9% identical to every other human’s DNA.
34. The heart beats about 100,000 times a day.
35. The brain uses about 20% of the body’s total energy.
36. Humans share about 60% of their DNA with bananas.
37. There are around 100 billion neurons in the human brain.
38. Your body has more bacteria cells than human cells.
39. There are about 640 muscles in the adult human body.
40. The human stomach gets a new lining every few days to protect itself from digesting itself.
41. Your bones are about five times stronger than steel of the same density.
42. The longest bone in the human body is the femur.
43. There are more than 7,000 languages spoken around the world today.
44. The average human has about 5 liters of blood in their body.
45. An adult body has around 5 million hair follicles.
46. Blood makes up about 8% of a person’s body weight.
47. The human nose can detect over 1 trillion different scents.
48. The smallest bone in the human body is the stapes bone, located in the ear.
49. The longest-living cells in the human body are brain cells.
50. The human body has 46 chromosomes in total.

Earth & Environment

51. The Earth is about 4.5 billion years old.
52. The Amazon Rainforest produces 20% of the world’s oxygen.
53. The Earth’s core is mostly made up of iron and nickel.
54. The Earth’s atmosphere is composed of 78% nitrogen, 21% oxygen, and trace amounts of other gases.
55. More than 70% of the Earth’s surface is covered by water.
56. Earth’s rotation is gradually slowing down, causing days to get longer over millions of years.
57. Antarctica is the driest, coldest, and windiest continent.
58. A single bolt of lightning can contain up to one billion volts of electricity.
59. There are over 200,000 species of plants in the world.
60. The Earth’s magnetic field protects us from harmful solar radiation.
61. The Dead Sea is the lowest point on Earth’s surface.
62. The highest recorded temperature on Earth was 56.7°C (134°F) in Furnace Creek Ranch, California, in 1913.
63. The Great Barrier Reef is the largest living structure on Earth.
64. The world’s deepest ocean trench is the Mariana Trench.
65. Earth’s oceans hold about 96.5% of the planet’s water.

Technology & Engineering

66. The first computer was the Antikythera mechanism, created in ancient Greece.
67. The first artificial satellite, Sputnik 1, was launched by the Soviet Union in 1957.
68. The first personal computer, the Apple I, was released in 1976.
69. The world’s fastest supercomputer, as of 2025, is Fugaku, in Japan.
70. The internet was originally developed as a military communication network called ARPANET.
71. The first video game ever created was called “Tennis for Two,” developed in 1958.
72. The first human-made object to land on the Moon was the Apollo 11 Lunar Module.
73. The world’s first successful organ transplant was a kidney transplant in 1954.
74. The first mobile phone call was made in 1973 by Martin Cooper.
75. The first electric car was built in the 1830s, long before gasoline-powered vehicles.
76. 3D printing technology was originally used for making prototypes before becoming widely accessible for various applications.
77. Modern airplanes can travel at speeds of up to 900 km/h (560 mph).
78. The first successful test of the laser was conducted in 1960.
79. The Hubble Space Telescope has captured images of galaxies billions of light-years away.
80. The first email was sent in 1971 by Ray Tomlinson.

Miscellaneous Science Facts

81. The speed of sound is about 343 meters per second in air at room temperature.
82. Bananas are naturally radioactive due to their potassium content.
83. A day on Venus is longer than a year on Venus.
84. The Eiffel Tower can be 15 cm taller during the summer due to thermal expansion of the metal.
85. Water expands as it freezes, which is why ice floats on water.
86. The inventor of the Pringles can is buried in one.
87. The first person to set foot on Antarctica was Roald Amundsen in 1911.
88. Honey never spoils, and archaeologists have found pots of honey in ancient tombs that are still edible.
89. An octopus has three hearts: two pump blood to the gills, and one pumps it to the rest of the body.
90. There are more than 200 bones in a baby’s body, but as they grow, some fuse together, leaving 206 bones in the adult body.
91. Your body is constantly shedding skin cells, with the average person losing about 30,000 to 40,000 skin cells every minute.
92. The concept of the “Big Bang” was first proposed by a Catholic priest and physicist, Georges Lemaître.
93. The word “robot” comes from the Czech word “robota,” meaning forced labor.
94. The largest volcano in the solar system is Olympus Mons on Mars.
95. The idea of evolution by natural selection was developed by Charles Darwin and Alfred Russel Wallace.
96. The most radioactive element in the periodic table is polonium-210.
97. Humans are the only species known to make and use fire.
98. The placebo effect occurs when people experience real changes in their health after receiving a treatment that has no active ingredients.
99. A cockroach can live for several weeks without its head.
100. The first cloned animal was Dolly the sheep, born in 1996.

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