How big is Psittacosaurus?
1.995 米!
A small, parrot-beaked ceratopsian dinosaur from the Early Cretaceous (approximately 125–100 million years ago). It measured about 6.5 feet (2 meters) in length and weighed around 44 pounds (20 kilograms). Known for its distinctive short beak, similar to a parrot’s, Psittacosaurus was a herbivore, feeding on tough vegetation. Some species had long filament-like structures on their tails, which might have been used for display.
人類
假設你是人類, 我也是人類! 你知道我們的同類有超過 70 億個嗎? 超多的. 事實上, 如果 你一秒遇見一個人, 大概要花上兩百年才能遇見全部人類! 最好現在就動身囉!
Rhamphorhynchus
A genus of long-tailed pterosaurs from the Late Jurassic (about 150 million years ago). With a wingspan of approximately 3–6 feet (1–2 meters), Rhamphorhynchus had a lightweight body, long jaws with sharp teeth, and a distinctive diamond-shaped vane at the end of its tail. It likely fed on fish, using its long teeth to snatch prey from the water while in flight.
FM 無線電波長
FM 代表頻率調變, 簡稱調頻, 是藉由載波的頻率變化來表示訊號的調變方式.