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11,491 facts. Click any fact to see its full page.
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📜 History 1,991
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🌿 Nature 759
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✨ General 68
✨ Dinosaur 10
The 'streetlight effect' describes the tendency to search for answers where looking is easiest — not necessarily where the truth is.
Publication bias — only positive results being published — skews our understanding of scientific evidence.
Peer review is not foolproof — high-profile fraudulent papers have been published in top journals.
P-hacking — manipulating analysis until results are statistically significant — is a major problem in research integrity.
Bayesian reasoning updates probability estimates as new evidence is incorporated — increasingly central to modern science.
The underdetermination thesis holds that multiple theories can explain the same data — experiment alone cannot resolve theory choice.
Science is not just a body of knowledge but a method — skepticism, replication, and revision are its core features.
Confirmation bias causes scientists, like everyone, to seek evidence supporting existing beliefs — peer review mitigates this.
The demarcation problem — distinguishing science from pseudoscience — has no universally agreed solution.
Occam's Razor — the principle of parsimony — states that among competing explanations, the simplest one should be preferred.
The replication crisis in psychology has shown that many famous studies fail to reproduce — undermining confidence in social science.
Thomas Kuhn described scientific progress as occurring through 'paradigm shifts' — not gradual accumulation.
Karl Popper argued that science is defined by falsifiability — a claim that cannot in principle be disproved is not scientific.
Pumice, ejected during volcanic eruptions, is the only rock that floats — and can raft species across oceans.
Some volcanoes emit blue lava — in Indonesia, Kawah Ijen's fires appear blue due to burning sulfur compounds.
The Santorini eruption around 1600 BC may have contributed to the collapse of Minoan civilization.
Vesuvius last major eruption was in 1944 — it's overdue for another, which threatens 3 million nearby residents.
The world's oldest active volcano may be Mount Etna — with records of eruptions going back 2,700 years.
Volcanic winter caused by the Laki eruption in Iceland (1783) triggered famines across Europe and contributed to the French Revolution.
The 'Ring of Fire' around the Pacific accounts for 75% of Earth's volcanoes.
Io, Jupiter's moon, has over 400 active volcanoes — the most volcanically active body in the solar system.
Underwater eruptions form new islands — Surtsey appeared off Iceland in 1963 and is still being studied.
The caldera of Toba supervolcano (74,000 years ago) may have reduced global human population to as few as 10,000.
Lahar — volcanic mudflow — can travel faster than a person can run and extends the danger zone far beyond the eruption.
Mount Pinatubo's 1991 eruption cooled global temperatures by 0.5°C for about 2 years.
The most deadly volcanic event in recent history was the 1902 eruption of Mount Pelée — killing 30,000 in minutes.
Volcanic soils (andisols) are extremely fertile — the slopes of volcanoes are some of the most productive farmland.
Stromboli in Italy has been erupting almost continuously for 2,000 years — it's called the 'Lighthouse of the Mediterranean.'
Mud volcanoes erupt not with magma but with cold mud mixed with gas — over 1,100 are known on Earth.
The Deccan Traps volcanic event 66 million years ago lasted 750,000 years and poured out enough lava to cover India twice.
Volcanic islands like Hawaii form above 'hot spots' — plumes of magma rising from deep in the mantle.
Paricutin in Mexico grew from a cornfield in 1943 and reached 424 meters in a year — entirely witnessed by humans.
Krakatoa's 1883 eruption was heard 4,800 km away in Australia.
Pillow lava forms when magma erupts underwater — the outer layer chills rapidly into pillow shapes.
The world's largest volcano by volume is Mauna Loa in Hawaii — larger than all others combined.
Lava tubes can extend for kilometers — Hawaii's Kaumana Cave is a lava tube system you can walk through.
Mount St. Helens' 1980 eruption released energy equivalent to 26,000 Hiroshima atomic bombs.
Volcanic ash can remain in the stratosphere for years — reducing global temperatures by 0.5–1°C.
The 79 AD eruption of Vesuvius buried Pompeii in 6 meters of ash — preserving it in extraordinary detail.
Iceland sits on 30 active volcanic systems and experiences an eruption every 4–5 years on average.
The supervolcano beneath Yellowstone releases 45,000 tons of CO₂ per day even between eruptions.
Hawaii's Kilauea is one of the most continuously active volcanoes on Earth — it has been erupting since 1983.
The 1815 eruption of Tambora was the largest in recorded history — it caused the 'Year Without a Summer' in 1816.
The foreskin is erogenous tissue — containing about 20,000 nerve endings in uncircumcised males.
Your blood vessels, if uncoiled, would stretch 100,000 km — enough to circle Earth 2.5 times.
Toenails grow about 3–4 times slower than fingernails — the big toenail takes 12–18 months to fully replace.
The olfactory bulb in the brain processes smell — it connects directly to the limbic system, bypassing the thalamus.
Sneezes travel at up to 160 km/h and can release 40,000 droplets.
The human eye has a natural blind spot where the optic nerve connects — the brain fills it in automatically.
Goosebumps are a vestigial response — in furry ancestors, raised fur provided insulation and appeared threatening.