1. Then there is fossilized pollen, from low shrubs and grasses that once grew in the Sahara. 还有一些石化的花粉，来自于曾经生长在撒哈拉的小灌木丛和草丛。
2. They also examined the fossilized bones of those three types of dinosaurs that were found on or near nests to determine their sex. 他们还研究了在巢穴里或巢穴附近发现的那三种恐龙的骨骼化石，以确定它们的性别。
3. Fossilized remains of Acanthostega, a primitive fish, reveal that even though the animal had rudimentary limbs, it could not walk on land. 棘螈是一种原始鱼类，它的化石遗迹显示，尽管棘螈有基本的四肢，但它却不能在陆地上行走。
4. Until the recent discovery of fossilized sauropod nesting grounds, scientists were thus uncertain whether sauropods laid eggs or gave birth to live young. 因此，直到最近发现蜥脚类恐龙筑巢地的化石之前，科学家们还不能确定蜥脚类动物到底是产卵还是胎生。
5. Anyway, it's this fossilized pollen along with the aquifers and the rock paintings, these three things are all evidence that the Sahara was once much greener than it is today. 总之，这些花粉化石，还有含水层和岩画，这三样东西都证明了撒哈拉沙漠曾经比现在绿得多。
