|
Subject |
Comments |
Views |
Author |
Date Written |
World's largest seed
|
view preview
The coco-de-mer palm tree ( Lodoicea maldivica) is endemic to the Seychelles. Its seeds are the largest and heaviest of any plant in the world, and have been highly prized over the centuries, which has almost driven the palm tree to extinction.
|
|
|
1 |
5678 |
duddy |
10 years ago |
Why do tigers swim?
|
view preview
Often dealing with hot, sweaty climates, tigers have learned to enjoy water, using it as a way to cool off, capture prey and relax.
|
|
|
1 |
7919 |
duddy |
10 years ago |
Which animal has the densest fur, try to guess
|
view preview
With up to one million hairs per square inch of its body, the sea otter has the densest fur in the animal kingdom. (To put this in perspective, you’ve probably only got 100,000 hairs or less on your whole head!) Together with a huge lung capacity, this makes these water-loving creatures extremely buoyant. The pups are born so buoyant, they're incapable of diving underwater, and are often left bobbing on the surface in a sea kelp bed while their mothers hunt for food nearby.
|
|
|
1 |
10118 |
duddy |
10 years ago |
What's the ocean's equivalent to the cheetah?
|
view preview
The shortfin mako ( Isurus oxyrinchus) is probably the champion speedster among sharks. Its speed has been recorded at 40 km/h (25 mph) with bursts of up to 74 km/h (46 mph). What's more, this high-leaping fish can leap approximately 9 m (30 ft) high or higher in the air. With its highly streamlined body, a lunate tail supported by keels, a sharply pointed snout, large eyes and some of the wickedest-looking teeth in its class, the mako shark is a highly sought-after game fish worldwide. ...
|
|
|
0 |
9434 |
duddy |
8 years ago |
What some fish will do to survive
|
view preview
Shallow waters will sometimes get too hot, forcing one fish to make a break for the shore. The tiny mangrove rivulus (shown above) avoids neurological damage from hot swamps by escaping to land. Retreating to land allows the fish to cool down through a process called evaporative cooling, which is akin to human sweating but using water from the environment. Previously, scientists had suggested that the fish, besides simply escaping hot water, might be taking advantage of evaporative cooling. Source: http://rsbl.royalsocietypublishing.org/content/11/10/20150689 ...
|
|
|
0 |
20479 |
duddy |
8 years ago |
What mechanism allowed early terrestrial animals to transition from water to land?
|
view preview
A new study finds that Mudskipper fish carry water in their mouths in order to eat prey outside of water. As seen in the video below, the hidden water is expelled at the moment of eating and it serves as a suction to move the water and their meal back toward the esophagus. The water suction, or “hydrostatic” tongue, may serve as the evolutionary bridge that allowed our aquatic ancestors to begin feeding on land.
|
|
|
1 |
36004 |
duddy |
9 years ago |
|
0 |
24637 |
ehd123 |
8 years ago |
What do elephants and fish have in common?
|
view preview
Nothing, except for this fish, appropriately named the elephantnose fish ( Gnathonemus petersii) for its peculiar, elongated spout. The fish is widespread in the flowing waters of West Africa and hunts insect larva at dawn and dusk. Its nose is actually a sensitive extension of its mouth, that it uses for self-defense, communication, navigation, and finding worms and insects to eat. This organ is covered in electroreceptors, as is much of the rest of its body. The elephantnose uses a weak electric field, which it generates with specialized cells called electrocytes, which evolved from muscle cells, to find food, to navigate in dark or turbid waters, and to find a mate. The elephantnose fish live to about 6 to 10 years. ...
|
|
|
2 |
5509 |
duddy |
7 years ago |
|
2 |
10720 |
duddy |
9 years ago |
|
0 |
5910 |
duddy |
8 years ago |
We are the stars, we are the universe
|
view preview
I'd like to share this mind-opening video. Astrophysicist Dr. Neil DeGrasse Tyson was asked by a reader of TIME magazine, "What is the most astounding fact you can share with us about the Universe?" This is his answer. By far, one of the best...
|
|
|
0 |
4506 |
ehd123 |
9 years ago |
|
0 |
8549 |
duddy |
9 years ago |
Watch this mysterious lake disappear before your eyes
|
view preview
Lost Lake, located in central Oregon, is known for rapidly draining every year through a six-foot (two-meter) wide hole in the lake's bottom (as shown in the video). Early in the following spring, however, the lake fills up again, as snowmelt from the surrounding mountains accumulates faster than water can drain out through the hole. That hole is really a lava tube - a geologic feature made when lava cools around the edges of a river of molten rock. After the hot lava drains away, it can leave an empty space. ...
|
|
|
1 |
15215 |
duddy |
8 years ago |
This strange animal can drink through its feet
|
view preview
The thorny dragon ( Moloch horridus) is an Australian lizard that grows up to 20 cm in length, and it can live for up to 20 years. Not only is it covered entirely with conical spines, it has the uncanny ability to suck in water from all over its body - including its feet - through capillary action.
|
|
|
0 |
32047 |
duddy |
9 years ago |
This knife can cut a water droplet in half!
|
view preview
It's called a superhydrophobic knife and it slices water droplets easier than a butter-knife cuts through butter. As its name suggests, anything that is 'superhydrophobic' is highly hydrophobic, i.e., extremely difficult to wet. This special knife uses polyethylene - a common plastic - zinc, and copper. Its surfaces was dipped into a solution of silver nitrate and a superhydrophobic solution called HDFT for 20 seconds, and once it was washed and air-dried, it was super-great at repelling water.
|
|
|
0 |
10702 |
duddy |
9 years ago |
|