ScienceCards — Bite-sized science facts

Discover curated science facts across biology, chemistry, physics, astronomy, and more. 76 community-curated facts to explore.

Popular facts

• Flying nonstop to the Moon on a commercial airliner at 900… — Flying nonstop to the Moon on a commercial airliner at 900 km/h would take about 18 days! The 384,400 km distance means you could line up about 30 Earths side-by-side between…
• Sea turtles navigate thousands of miles using Earth's… — Sea turtles navigate thousands of miles using Earth's magnetic field as a biological GPS. They detect both intensity and angle—hatchlings reorient instantly when researchers shift…
• Sharks (450 million years old) have existed for two… — Sharks (450 million years old) have existed for two galactic years—our solar system has orbited the Milky Way twice since they appeared. They predate dinosaurs and are older than…
• White light is a mix of all visible wavelengths. — White light is a mix of all visible wavelengths. Newton proved this in 1666 by splitting light into a rainbow with a prism, then recombining the colors back into white with a…
• The largest black hole we know of is TON 618, with a mass… — The largest black hole we know of is TON 618, with a mass estimated at around 66 billion times the mass of our Sun, or roughly 22 trillion Earths.
• In 1971, Apollo 15’s David Scott dropped a hammer and… — In 1971, Apollo 15’s David Scott dropped a hammer and feather on the Moon. In the vacuum, both hit the surface at the same time, proving Galileo’s idea and supporting Einstein’s…
• Earth’s geodynamo—molten iron and nickel moving in the… — Earth’s geodynamo—molten iron and nickel moving in the outer core—creates Earth's magnetic field. This field blocks solar wind and cosmic rays and keeps the atmosphere intact…
• Both humans and cats have a limbic system. — Both humans and cats have a limbic system. The system contributes to social bonding, emotional processing, memory formation, motivation, and survival-related behaviors—core…
• A teaspoon of soil teems with billions of microbes that… — A teaspoon of soil teems with billions of microbes that play a role in biodiversity and ecosystem health. Even the smallest organisms play a crucial role in maintaining the…
• Cats’ brains are 90% structurally similar to humans in… — Cats’ brains are 90% structurally similar to humans in emotion and problem-solving areas. This explains their empathy, memory, social bonds, and even playful manipulation.
• Earth’s magnetic field shields us by deflecting charged… — Earth’s magnetic field shields us by deflecting charged solar particles. Without it, solar radiation could strip away our atmosphere over time, like what happened to Mars.
• Research shows elephants use unique vocalizations like… — Research shows elephants use unique vocalizations like names—each develops a distinct call others recognize. This rare ability highlights their advanced cognition and intricate…