Only desert specialists that had evolved to withstand extreme heat 进化出能承受极端高温的沙漠专家
and evolved into these highly specialized beasts. 进化成了这些高度专门化的巨兽
They evolved flight long before the mammals. 进化出飞行技能远早于哺乳动物
others evolved to feed on the grazers. 另一些哺乳动物 则进化为以食草动物为食
But just as some mammals evolved to feed on the grass, 但在一些哺乳动物 进化成以草为食的同时
They have evolved a whole swathe of game-changing adaptations. 它们进化出了 一系列极为重要的适应性
mammals have evolved an extraordinary solution. 哺乳动物 已经进化出一种非凡的解决方案
countless new kinds of fish also evolved. 无数种新的鱼类也进化了
they've evolved to hover just like insects... 它们进化出像昆虫一样的悬停能力
Feathers, that first evolved to keep dinosaurs warm, 羽毛最初进化是为帮助恐龙保暖