The best science trivia walks the line between "no way" and "wait, really?" Every answer here survives a fact-check.
Are bananas actually radioactive?
Yes — mildly, from potassium-40. There's even an informal unit: the 'banana equivalent dose.'
What is the chemical symbol for gold?
Au, from the Latin aurum.
Can water boil and freeze at the same time?
Yes — at its 'triple point' of temperature and pressure, all three phases coexist.
What is the hardest natural substance on Earth?
Diamond — though it can still shatter; hardness isn't toughness.
How many elements are on the periodic table?
118 confirmed so far.
What gas makes up about 78% of Earth's atmosphere?
Nitrogen — not oxygen, which is about 21%.
What is the speed of light in a vacuum?
About 186,282 miles per second (299,792 km/s).
Which scientist proposed the three laws of motion?
Isaac Newton.
What is the most abundant element in the universe?
Hydrogen — roughly three-quarters of all ordinary matter.
Hot water can sometimes freeze faster than cold water. What is this called?
The Mpemba effect — still actively debated by physicists.
What part of the atom carries a negative charge?
The electron.
What natural phenomenon is roughly five times hotter than the surface of the Sun?
Lightning — around 50,000°F.
What does DNA stand for?
Deoxyribonucleic acid.
Which planet's density is so low it would float in a big enough bathtub?
Saturn — its average density is less than water's.
Is glass a slow-flowing liquid, as the old story about cathedral windows claims?
No — it's an amorphous solid. Old windows are thicker at the bottom because of how they were made.
The glass one is our favorite kind of trivia: the correction of a "fact" you've been confidently repeating for years.
