本期內(nèi)容：
Newly discovered fossils show that moths and butterflies have been on the planet for at least 200 million years. Scientists found fossilized butterfly scales the size of a speck of dust inside ancient rock from Germany. Butterflies and moths are fragile creatures, meaning fossil evidence is rare.
Researchers say they can learn more about the conservation of butterflies and moths by studying their early evolution.

fossil: 化石
moth: 蛾子
scale: 翅瓣
speck: 一點
fragile: 脆弱的
conservation: 保護
evolution: 演變

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