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Get ready to have your mind blown with fascinating science facts.(Image credit: Alona Horkova/Getty Images)
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The world is a place of wonder, filled with peculiar science and enigmatic lore. This provides Live Science with ample subject matter for our beloved Life’s Little Mysteries series, which is published every weekend. We have been chronicling mysteries since 2004 and have yet to exhaust the supply of strange subjects to investigate. Each mystery is accompanied by a wealth of facts, such as which creatures are evolving most rapidly and the feasibility of constructing a transatlantic tunnel. Truthfully, we could continue, but we would need to provide links to our thousands of mysteries. Therefore, for your intellectual enjoyment, we have compiled 70 of the most remarkable facts here.
70. Since the emergence of Homo sapiens approximately 300,000 years ago, there have been between 10,000 and 12,195 generations of modern humans.
69. Cuttlefish possess pupils shaped like the letter W, the reason for which remains a mystery to scientists.
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68. The existence of King Arthur is uncertain. On one hand, he appears to have been a fictional creation from an ninth-century manuscript. On the other hand, it’s conceivable that another document, referencing a sixth-century chronicle, might pertain to a real Arthur; additionally, numerous royals in Britain and Ireland during the mid-sixth to mid-seventh centuries bore the name Arthur. However, some experts contend that even if Arthur were a historical figure, he would differ from the legendary accounts.
67. The human body contains either seven or eight orifices, depending on the definition of “orifice” employed.
66. Despite having dispatched humans and spacecraft into the cosmos, we still lack precise knowledge of gravity’s strength.
65. While Earth possesses abundant water, some experts suggest that not all of it has been part of the hydrological cycle. This is because our planet harbors “juvenile water” deep beneath its crust, which has never circulated within the water cycle.
64. From an evolutionary standpoint, humans share an equal degree of relation to both dogs and cats. However, when examining the organization of DNA strands within chromosomes, our closer relation is to felines.
63. The contenders for the title of the world’s deepest cave are both situated in Abkhazia, an autonomous republic within the Republic of Georgia.
62. To human eyes, tigers appear orange due to our trichromatic color perception. Conversely, prey animals possessing dichromatic color vision, such as deer, perceive tigers as green.
61. The absence of oxygen in the vacuum of space, and thus the lack of an oxide layer to act as a separator, causes most metals to adhere to each other.
60. The Finke River in Australia, dating back 300 million to 400 million years, is recognized as the planet’s most ancient river.
59. Emeralds are less common than diamonds, at least concerning the contents of the world’s established mines.
58. Your brain typically filters out the sight of your nose, effectively canceling its image.
57. The oldest identified boat is 10,000 years old, but it is highly probable that humans developed watercraft at least 60,000 years ago during their migration to Australia.
56. Gastric acid possesses the capability to dissolve metal; however, it does not corrode the human body due to a robust, viscous mucus lining in the stomach that is alkaline and neutralizes the acid.
55. The remarkable cushioning properties of a cat’s paw pads, often called toe beans, have inspired scientists to research them for the development of enhanced footwear for paratroopers.
54. While Earth is projected to endure for approximately 9.5 billion years, most planets orbiting red dwarf stars are expected to persist for significantly longer durations — potentially extending to trillions of years.
53. The maximum magnitude of an earthquake is most likely around 9.5, though there remains a minuscule possibility of a greater event.
52. Rainbows are not genuinely arches but rather complete circles. The full circular form is visible from elevated viewpoints, such as from an aircraft or atop a mountain.
51. It is a natural phenomenon for deserts to form adjacent to oceans, which can result in exceedingly foggy desert environments.
50. Prior to the 1960s, researchers generally believed that people primarily dreamed in monochrome.
49. Pumpkins are classified as a type of berry, albeit a very large one.
48. The stimulation of the vagus nerve through bowel evacuation can lead to a reduction in blood pressure and heart rate — explaining the pleasant sensation associated with defecation.
47. Iceland was historically the sole nation devoid of mosquitoes, but this situation altered in October 2025.
46. For a human to achieve flight with wings, a wingspan of approximately 20 feet (6 meters) would be necessary to enable even minimal gliding through the air.
45. Leaving the pit in an avocado does not technically impede the browning process of the entire fruit; rather, it prevents oxygen from causing the browning of the flesh directly beneath it.
44. At approximately 1,300 feet (400 meters) below sea level, the shores of the Dead Sea represent Earth’s lowest terrestrial elevation.
43. During a significant adolescent growth spurt, some teenagers may experience an increase in height of four to five inches (10 to 13 centimeters) within a single year.
42. Black holes are characterized by their darkness because they absorb any light that crosses their event horizon; consequently, if one were to enter a black hole, the experience would be extraordinarily luminous.
41. Following waking, it can take your brain 15 to 30 minutes to attain its full cognitive capacity, a phase referred to as “sleep inertia.”
40. During the last ice age, lower sea levels facilitated the connection between North America and Asia via a vast land bridge. A similar land bridge permitted the ancestors of Tyrannosaurus rex to migrate from Asia to North America approximately 68 million years ago.
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39. The slowest terrestrial creature is likely the banana slug, moving at an incredibly leisurely speed of 0.006 mph (0.0096 km/h), or one-tenth of an inch per second (2.7 millimeters per second). In comparison, the common garden snail glides along at a comparatively swift 0.03 mph (0.048 km/h), or half an inch per second (1.3 centimeters per second).
38. Although infrequently, in particular circumstances, women were permitted to participate as gladiators in ancient Rome; however, there are no recorded instances of any of them perishing in combat.
37. The sound emanating from the supermassive black holes in the Perseus cluster as they expel gas would register as a low B flat, approximately 57 octaves below middle C.
36. All newts are classified as salamanders, but the reverse is not true; not all salamanders are newts.
35. Despite the Colorado River toad excreting 5-MeO-DMT, one of the most potent psychedelics known, through its poison glands, ingesting it will not induce a high.
34. The 1883 eruption of Krakatau is frequently cited as the loudest sound in recorded history, with audible reports reaching distances of 1,900 miles (3,000 kilometers).
33. The earliest known human ancestor within the genus Homo resided in Africa roughly 2.8 million years ago, although its specific species remains unidentified.
32. The largest known prime number comprises 41,024,320 digits.
31. Frogs absorb both air and liquids through their skin.
30. A bullet discharged from a 223 Remington firearm achieves velocities of up to 2,727 mph (4,390 km/h) — sufficiently rapid to traverse 11 football fields in a single second.
29. A turtle’s carapace is composed of 50 bones.
28. Contrary to popular depictions in cinema, ancient Egyptians did not employ booby traps within the pyramids.
27. The longest undersea segment of any tunnel is found in the Channel Tunnel, which features a 23.5-mile (37.9 kilometers) underwater section linking England and France.
26. Notwithstanding contrary evidence, Christopher Columbus maintained his assertion that the lands he “discovered” were indeed parts of Asia, likely to secure his remuneration.
25. The primary mirror of the James Webb Space Telescope measures 21.3 feet (6.5 meters) in diameter, providing a total light-collecting surface area exceeding 270 square feet (25 square meters).
24. As of March 2026, there were 970 recognized natural satellites in the solar system (subject to definitional variations of what constitutes a moon).
23. The observable universe contains an estimated 10,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000 atoms.
22. It typically takes five to 10 years for a body interred in a coffin to fully decompose to a skeletal state.
21. The Atlantic Meridional Overturning Circulation is a system of ocean currents that form a loop within the Atlantic Ocean, transporting 600 million cubic feet (17 million cubic meters) of water per second and 1.2 petawatts of heat — equivalent to the energy output of approximately one million power plants operating concurrently.
20. The deepest point on Earth is the bottom of the Mariana Trench, situated approximately 35,876 feet (10,935 meters) beneath the surface. This depth surpasses the height of Mount Everest by roughly 7,000 feet (2,100 meters).
(Image credit: Alona Horkova /Getty Images)
19. Researchers have demonstrated that octopuses can be deceived by a variation of the “rubber hand illusion.” This is achieved by simultaneously stroking a real octopus arm concealed from view and a visible artificial octopus arm. When the artificial arm was subjected to a pinch, the octopus responded as though its own limb had been attacked, manifesting as a color change or retraction.
18. The asteroid responsible for the extinction of the dinosaurs impacted Earth at a velocity of 27,000 mph (43,000 km/h).
17. Approximately half of all eukaryotic species inhabiting Earth are insects.
16. Mount Everest holds the distinction of being the tallest mountain solely by altitude, standing at 29,031.69 feet (8,848.86 m) above sea level. However, if Mauna Kea, an inactive volcano in Hawaii, is measured from its base to its summit, it is actually taller, reaching an altitude of 33,497 feet (10,211 m).
15. You are more prone to shedding tears when slicing an onion with a dull knife compared to a sharp one.
14. Antarctica transitioned into a continent approximately 34 million years ago, following the severing of its land connections with Australia and South America.
13. Despite lacking brains, jellyfish, sea anemones, and hydras exhibit surprisingly sophisticated behaviors.
12. Kangaroos possess three vaginal canals.
11. Numerous shark species experience temporary paralysis when inverted.
10. The human heart demonstrates remarkable endurance, beating approximately 100,000 times daily and circulating roughly 2,500 gallons (9,500 liters) of blood on average.
9. Dragonflies rank among nature’s most successful predators, capturing prey with a success rate of up to 97%. For comparison, tigers achieve a success rate of only 10%.
8. Indeed, certain figs do contain wasps.
7. The training of OpenAI’s GPT-4 is estimated to have consumed 50 gigawatt-hours of energy — sufficient to power San Francisco for three days.
6. The most ancient DNA sequenced from animal and plant specimens dates back 2.4 million years.
5. On average, an individual produces between 30 to 91 cubic inches (500 to 1,500 cubic centimeters) of gas daily, irrespective of dietary habits. Fortunately, over 99% of these gases are odorless.
4. The record for the largest number of offspring born from a single live birth in a female puff adder is 156 fully developed snakelets.
3. The maximum number of times a sheet of paper has been folded in half is 12. If folded 42 times, it would reach a height exceeding 273,280 miles (439,800 kilometers) — surpassing the average distance between Earth and the moon.
2. It is feasible to transmute one element into gold, though only in extremely minute quantities.
1. The most commonly cited number of organs in the human body is 78, with the skin being the heaviest organ.
Recent updates
This compilation was initially published on January 4, 2026, and was subsequently revised on February 27 and June 30 to incorporate additional facts.
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