 
        
            Dragonfly 
            Aeschnidium
            The tissue-thin membranes of this dragonfly's wings are so
            immaculately preserved that it's easy to picture the insect skimming
            along the surface of a lake at dusk 130 million years ago. Perhaps
            the toxic gas of a volcanic eruption suffocated it, and a fine
            coating of volcanic ash protected its fragile remains. Unlike their
            comparatively colossal ancient forbears, which had wingspans
            stretching over two feet, dragonflies of the Early Cretaceous were
            similar in size and anatomy to those flying through wetlands today.