Big extinct birds such as the giant moa, thunderbirds and elephant birds 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。
Genetic material was pinpointed for the giant moa and 10ft tall, half tonne elephant birds 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。
Using new techniques we obtain DNA signatures from a variety of fossil eggshells, including the extinct moa and elephant birds and 19, 000-year-old old emu.
我们还利用新技术检测了各类蛋壳化石，包括已灭绝的摩亚、象鸟以及19000年前的鸸鹋蛋壳，并从中获取了DNA签名。
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