Big extinct birds such as the giant moa, thunderbirds and elephantbirds all left eggshells behind them.
像恐鸟、雷鸟和象鸟这样已经灭绝的鸟类都留下了它们的蛋壳化石。
2
Genetic material was pinpointed for the giant moa and 10ft tall, half tonne elephantbirds that died out hundreds of years ago.
提取的基因信息进一步证实，“摩亚”恐鸟以及重达半吨、高近10英尺的象鸟也就灭绝于数世纪前。
3
Using new techniques we obtain DNA signatures from a variety of fossil eggshells, including the extinct moa and elephantbirds and 19, 000-year-old old emu.