Biology Facts & Trivia - Page 2

Red blood cells A red blood cell takes 20 seconds to circulate around the human body. Submitted by: Jalis - Karachi, Pakistan
Aa-choo! The average speed of a sneeze is around 160 km (100 mi) per hour. Submitted by: Dhairya - United Arab Emirates
Dolphin and whale Dolphins and whales don't drink Submitted by: Mesgana Wondirad - Ethiopia
Ovum The ovum (female egg cell) is the largest cell in the human body. Submitted by: Joemari Olea - Philippines
Cracking knuckles The cause of the popping sound produced by knuckle cracking is largely a mystery. Submitted by: Ankur - Alwar, India
Thumb and nose The length of your thumb is about the same as that of your nose. Submitted by: Vashita Dehradun - India
A red blood cell Red blood cells have no nucleus. Submitted by: Adarsh - Patna, India
Algae As much as 70% oxygen in our atmosphere is produced by marine plants and Submitted by: Think - United States
Bacteria The biomass of all bacteria on Earth is more than all the plants and animals combined. Submitted by: Bookworm - Greenbrier, Tennessee, United States
Synthia The synthetic biological cell "Synthia" is the first living organism whose parent is not a living thing but a computer. Submitted by: Hyde - Toronto, Ontario, Canada
DNA Humans share 60% of DNA with a banana. Submitted by: Grant - Philadelphia, Pennsylvania, United States
Femur Bone The femur (thigh bone) is the largest and longest bone in the human body.
Jaw The jaw is the strongest muscle in the human body in terms of exerting Submitted by: Vineet - India
Mayfly An adult Mayfly's life is as short as a few minutes, but its body hatches for about a year. Submitted by: Pronoy - Sundargarh, India
Fingernails The nails on long fingers grow faster than short fingers; and fingernails grow four times faster than toenails. Submitted by: Micael Gabriel - Manila, Philippines
DNA There's about 1.8 m (6 ft) long DNA inside every cell nucleus in our body, and an average adult body contains around 50 trillion (million million) cells. Submitted by: Steve - Boston, Massachusetts, United States
Bird with magnetoreception compass Some migratory birds have a "magnetic compass" in their body (a sense called Magnetoreception) to help them navigate using Earth's magnetic field. Submitted by: Akki - Dubai, United Arab Emirates
Catfish The catfish father keeps the eggs in his mouth until they are ready to be Submitted by: Reedell
Water Bear  Tardigrade The tiny Water Bear (Tardigrade) can survive environments extreme enough to kill any other animal - with temperatures as low as -273°C close to Absolute Zero to as high as 151°C. Submitted by: Justin - Vancouver, British Columbia, Canada
Cornea in the eye Corneas are the only tissues that don't require blood. Submitted by: Pritesh Jain - Sirohi, Rajasthan, India