玛雅哺乳动物(以及更多)!)

If you visit Maya: The Exhibition, one thing you will notice is how often animals are represented in the artifacts shown, and even in the glyphs used in their ancient writing system. Historic and modern cultures all around the world often use images of animals in their art and to decorate everyday objects. These animals might be important food sources, or religious or cultural symbols, or even pets.

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罐子里是什么?

The 动物学 collections at Cincinnati Museum Center are divided into “fluid” and “dry” collections. The fluid collection space is one of my favorites at the museum – it is equal parts creepy and fascinating for most visitors. 在干收藏品中, specimens are typically skinned (removing all the organs and soft tissue), 塞, 和干.

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动物学CSI

动物学CSI By: Heather Farrington, Curator of 动物学 Even at the dawn of the genetic age, it was known that only living (or once living) cells could be a source of DNA for study. 血, tissues such as skin and muscle, and reproductive cells such as sperm were standard sources of genetic material. 结构,如皮毛, 头发, 羽毛, 贝壳, 爪子, and nails were thought to be made up only of secreted proteins, 没有活细胞, and therefore were of little value to geneticists unless there were still skin cells attached. If you’ve ever seen a TV crime drama, this is why 头发 samples are always collected by pulling rather than cutting, so that the skin cells at the base of the 头发 follicle (living cells containing DNA) are attached. After a cell dies, the DNA inside begins to degrade, or break down […]

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