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Researchers have discovered how seals and sea lions evolved to swim.
The findings could have potential implications for improving the design of man-made machines such as underwater drones and submersibles.
Using cutting-edge engineering and animal behaviour, scientists have explained the origins of efficient swimming in the animals.
Seals and sea lions are fast-swimming ocean predators that use their flippers to “fly” through the water.
But not all seals are the same – some use their front flippers to swim, while others propel themselves with their back feet.
Fur seals and sea lions have wing-like front flippers specialised for swimming, while grey and harbour seals have stubby, clawed paws and swim with their feet.
新发现：牛角和玫瑰花刺遵循统一数学规律 | 幂次级联 | 幂次法则 epochtimes.com - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from epochtimes.com Daily Mail and Mail on Sunday newspapers.
The robot’s vision system can identify more than 90% of all visible apples.
A new autonomous harvesting robot developed by Australia’s Monash University is capable of identifying, picking and dropping apples in seven seconds.
Following extensive trials in February and March, the robot was able to harvest more than 85% of all reachable apples in the canopy identified by its vision system.
Of all apples harvested, less than 6% were damaged due to stem removal.
With the robot limited to half its maximum speed, the median harvest rate was 12.6 seconds per apple, the researchers say.
In streamlined pick-and-drop scenarios, the cycle time reduced to roughly nine seconds.
They’re called “tigers” because of their distinctive stripes, and “wolves” because of their alleged ferocity – “alleged” because there hasn’t been a confirmed sighting of a Thylacine in the wild for nearly a century. A new study of the eating habits of
Thylacinus cynocephalus may give it a new nickname that better fits the much beloved yet still officially extinct creature – Tasmanian jackal.
“The thylacine (
Thylacinus cynocephalus), the iconic recently extinct marsupial, is considered a classic example of convergent evolution with the distantly related placental wolf or dog, though almost nothing is actually known regarding its ecology. This lack of data leads to questions regarding the degree of convergence with, and the similarity of, the functional ecology of the thylacine and the wolf/dog.”