Quiz: Is This Scientific Common Knowledge Fact True or False?
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Is This Scientific Common Knowledge Fact True or False?
By: Zoe Samuel
Image: shutterstock

About This Quiz

There are certain things that everyone knows to be true. For example, the Earth is a flat disc at the center of the universe. All the stars and planets rotate around it. The whole planet is only 6,000 years old and it was created in seven days, and its climate is definitely stable and not at all affected by emissions of carbon dioxide. Humanity came into being fully formed and is not related to apes in any way. Then, there are facts like how organic food is always healthier, coffee stunts your growth, all fingerprints are totally unique, humans have five senses, ghosts are real and so on. 

Of course, all of these things are nonsense. Either they're completely disproven - the world is certainly much older than 6,000 years - or they are questionable at best. However, at some point or other, every single one of them was considered an unassailable fact that only a very silly or mad person would possibly contest. This is the genius of science. Science, like humans, is always evolving, and that means that what we know to be true one day always comes with the caveat that new evidence may prove us wrong - or at least, reveal the truth more precisely. Staying on top of the truth means always keeping up to date with what we know, and being open to the possibility that we may know more tomorrow, and that will mean changing our minds.

How much do you know about facts as they stand now? Let's find out!

1.0 of 35
The Earth is 13.8 billion years old. True or false?
2.0 of 35
The Earth is a sphere. True or false?
3.0 of 35
If you have 23 people in a room, the odds that two of them share a birthday are higher than 50%. True or false?
4.0 of 35
Cashnew nuts grow out of a kind of apple. True or false?
5.0 of 35
Human bodies are 70% water. True or false?
6.0 of 35
Humans have 99% of the same DNA as apes. True or false?
7.0 of 35
Water conducts electricity. True or false?
8.0 of 35
Humans only use 10% of our brains. True or false?
9.0 of 35
The Great Wall of China is the only man-made structure visible from space. True or false?
10.0 of 35
Goldfish have a three-second memory. True or false?
11.0 of 35
Lightning never strikes the same place twice. True or false?
12.0 of 35
If you cut a liver in half, it will grow back. True or false?
13.0 of 35
If something is a scientific theory, that means it has not been proven true.
14.0 of 35
There is a side of the moon that never gets any sunlight. True or false?
15.0 of 35
Your hair and fingernails grow after death. True or false?
16.0 of 35
Humans have five senses. True or false?
17.0 of 35
7% of people who have ever lived are currently alive. True or false?
18.0 of 35
Greenland sharks can live 500 years. True or false?
19.0 of 35
A sugar cube-sized lump of a neutron star would weigh 100 million tons on Earth. True or false?
20.0 of 35
One 18-inch pizza is actually less pizza than two 12-inch pizzas. True or false?
21.0 of 35
There are more trees on Earth than stars in the Milky Way. True or false?
22.0 of 35
Days on Venus are longer than years on Venus. True or false?
23.0 of 35
It rains diamonds on Jupiter.
24.0 of 35
Horses cannot throw up. True or false?
25.0 of 35
If you cry in space, the tears just ball up on your eyes until you wipe them. True or false?
26.0 of 35
Gorillas can use human birth control and it will work. True or false?
27.0 of 35
Male seahorses, not female ones, carry the fertilized eggs to term. True or false?
28.0 of 35
Wolf packs are led by an alpha male. True or false?
29.0 of 35
The furthest man-made object from Earth is 1 billion miles away. True or false?
30.0 of 35
You can't crack an egg at the bottom of the ocean. True or false?
31.0 of 35
A Mobius strip only has one side. True or false?
32.0 of 35
Male sharks have thicker skin than female sharks. True or false?
33.0 of 35
Babies have more bones than adults. True or false?
34.0 of 35
Mercury is the only metal that is a liquid at room temperature with just one atmosphere of pressure.
35.0 of 35
Motor neurons are the largest cell in the human body.
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