This dinosaur has a tail with an unexpected and unique shape that consists of extremely tall neural spines and elongate chevrons, which forms a large, flexible fin-like organ capable of extensive lateral excursion. Using a robotic flapping apparatus to measure undulatory forces in physical models ...
Such an elongated and slender structure would allow achieving tip velocities in the order of 30 m/s, or 100 km/h, far slower than the speed of sound, due to the combined effect of friction of the musculature and articulations, as well as aerodynamic drag. The material properties of the ...
The tails of these creatures end in a small, bulbous tip that is covered by dozens of pointed, wedge-shaped scales with sharp, bladelike edges. Normally held extended behind the creature as it moves through the forest, this tail can be rapidly snapped foward; an action which hurls these sc...
9. Zhang found that the filaments running down its back andtailmust have made the dinosaur look like an orange-and-white-striped barber pole. 张福成发现,延伸至背部和尾部的纤维丝使得龙鸟看起来活像一块带有黄白条纹的理发店招牌。 youdao
What distinguishes the Florida panther from other subspecies is a tail broken at the tip and a unique marking on the back. This subspecies is also smaller than cougars from northern and southern parts of the country, but larger than individuals found in the neotropics. Adult individuals are 180...
A meteorite 200 times bigger than the dinosaur-killing asteroid helped life on Earth flourishThe awesome destructive power of asteroids is undeniable, just ask the dinosaurs. New research suggests that a huge space rock that struck Earth over 3 billion years ago may have benefitted early life.Spa...