Subject |
Comments |
Views |
Author |
Date Written  |
Surviving the Desert: Kangaroo Rats
|
view preview
The harsh desert environment is known for its scorching temperatures and scarcity of water, making it a challenging place for most creatures to thrive. However, amidst this seemingly inhospitable landscape, the kangaroo rat stands out as a remarkable example of nature's ingenious adaptations. These small rodents have not only managed to survive but thrive in the desert with virtually no drinking water. The secret to their survival lies in their unique physiological features, particularly their kidneys' specialized structure. Generally, the majority of water reabsorption in the kidneys occurs in the loop of Henle (see illustration). This structure is responsible for the reabsorption of water and essential ions from the urine back into the bl ...
|
|
|
0 |
2471 |
bio_man |
A year ago |
Canada's only desert
|
view preview
You probably wouldn't associate Canada with having any deserts, since the country is typically attributed with winters that are long and harsh. However, that's not entirely true if you visit the southern region of Osoyoos, British Columbia, Canada, known as the Okanagan Desert. In this area, summer temperatures regularly exceed 38˚C (100 °F), and portions of the area receive roughly 250 to 300 mm (10 to 12 inches) of rain per year – compare that to Vancouver, which receives approximately 1120 mm (43 inches) of rain per year. While some areas in British Columbia experience hotter summer temperatures and are at least as arid, the South Okanagan area is home to several species of plants and animals that are not found elsewhere in Canada. For e ...
|
|
|
2 |
21461 |
bio_man |
5 years ago |
Check out the footage of this tricky plant
|
view preview
To tap into scarce water supplies, most desert plants have extensive root systems that burrow deep or spread wide. But one desert moss has a different trick up its sleeve: a thirst-quenching structure called an awn. Awns are tiny, hairlike structures that project from the end of each leaf to capture water (above). For the first time, scientists have examined in detail how this moss ( Syntrichia caninervis) pulls water right from the air using its awns. At the smallest scale, the awns are covered with grooves about 100 nanometers deep and 200 nanometers wide, the perfect size for dew to condense within them when conditions are right. Those nanogrooves lie within larger troughs that measure about 1.5 micrometers deep and 3 micrometers wide, a ...
|
|
|
0 |
4264 |
duddy |
8 years ago |
Nature's gymnast lurking in the deserts of Morocco
|
view preview
Found in the deserts of Morocco, the cartwheeling spider ( cebrennus rechenbergi) uses all eight of its legs to cartwheel and roll away from predators. Using forward or backward flips, this movement effectively doubles its normal walking speed similar to acrobatic flic-flac movements used by gymnasts. Interestingly, C. rechenbergi is the only spider known to use this unique form of rolling locomotion!
|
|
|
0 |
4286 |
duddy |
9 years ago |
A town with nothing to offer
|
view preview
Welcome to Town Nothing! In Arizona, USA, there is a town known as the town of Nothing, literally. It is now completely abandoned, offering people nothing but a good place to film a western movie.
|
|
|
1 |
20752 |
duddy |
10 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 |
32249 |
duddy |
10 years ago |
Mysterious rocks - help solve this puzzle
|
view preview
Dozens of stones up to 300 kg in weight are traveling for hundreds of metres across a dried lake in America. But no one's ever seen them do it. So, what's making these Death Valley 'sailing stones' move?
|
|
|
1 |
1116 |
duddy |
10 years ago |
|