Image of the Day: Inside an Ammonite CT scans of hollow fossilized ammonites revealed that the invertebrates could have been buoyant enough to swim like their distant modern cousin, the nautilus.
一些您可能无法访问的结果已被隐去。
显示无法访问的结果一些您可能无法访问的结果已被隐去。
显示无法访问的结果