Science
Space, biology, physics and very large or very small things.
Questions in Science
- How many metres deep can a sperm whale dive?
- How deep is the Mariana Trench, in feet?
- How far away is the Moon, in miles?
- How many light years away is the nearest star to the Sun?
- How far away is the Sun, in miles?
- How fast does light travel, in kilometres per second?
- How fast does the Earth orbit the Sun, in miles per hour?
- How hot is a lightning bolt, in degrees Celsius?
- How hot is the surface of the Sun, in degrees Fahrenheit?
- How many kilometres of blood vessels are in a human body?
- How many days can a cockroach survive without its head?
- How many years does an elephant live in the wild?
- How many months does it take to fly to Mars?
- How many seconds does sunlight take to reach Earth?
- How many feet of DNA are packed into a single human cell?
- How many ants are there on Earth?
- How many atoms are in a single grain of sand?
- How many bacteria live on a typical smartphone screen?
- How many bacteria live in the human body?
- How many species of birds are there?
- How many bones are there in an adult human body?
- How many breaths does a person take per day?
- How many cells are in the human body?
- How many elements are in the periodic table?
- How many galaxies are in the observable universe?
- How many hearts does an octopus have?
- How many lightning strikes hit the Earth each day?
- How many litres of blood does the heart pump per day?
- How many neurons are in the human brain?
- How many people have walked on the Moon?
- How many exoplanets have been confirmed?
- How many species have been formally described by science?
- How many stars are in the Milky Way?
- How many taste buds does a human have?
- How many times per second does a hummingbird beat its wings?
- How many times does the average human heart beat in a lifetime?
- How many tons does a blue whale weigh?
- How many tons does an average cumulus cloud weigh?
- What percentage of the world’s oxygen does the Amazon produce?
- How many tons does the International Space Station weigh?
- What percentage of the ocean floor has been mapped in detail?
- How many years old is the Earth?
- How many years old is the universe?
Answers at a glance
Spoilers ahead — if you would rather guess, open the questions above first.
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Five questions, mixed categories, new every midnight ET.