Biology Facts & Trivia - Page 2Dolphins and whales are mammals that don't drink water. Sheeps, goats and the octopus have almost rectangular-oval pupils in their eyes. Sciensational.com Giraffes could pass out with blood filling their brain when they lower their neck, so they have a sponge-like organ in the head which slowly gathers and releases blood.
A woodpecker can peck with a force as high as 1,200 g's with each impact - equivalent to a human striking head against a wall at a speed of 25km (16 miles) an hour each time. A large woodpecker can peck as fast as 20 times a second and up to 12,000 times a day. Sciensational.com
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Avocados have the highest fibre and calories of any fruit. Pineapple is actually a giant berry. Sciensational.com Rats can swim for half a mile (0.8 km) without rest, and can tread water for three straight days. Our eyes can distinguish as many as 10 million distinct colour variations. An average adult human has skin weighing about 3 kilograms in total. While we're awake, our brain generates enough power to illuminate a light bulb of 25 watts. While hibernating, frogs breathe through their skin.
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The Golden "Poison Dart" frog in South America is most poisonous vertebrate in the world. 
The acceleration rate of a flea's jump is 20 times that of a space shuttle during launch.
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The world's smallest flowering plant is the Wolffia, whose one full bouquet of flowers can fit on the head of a push-pin. 
Rafflesia Arnoldii is the largest flower in world, and can grow as big as an umbrella. 
The world's smallest rodent is Pygmy Jerboa - measuring only a couple of inches in length - and can run as fast as a horse. 
The world's smallest frog - The Little Grass Frog - is no bigger than a house fly. 
With more than 80,000 arms, the Basket Starfish has the greatest number of arms.