Oldest-known fetal horse fossil is 48-million-years old

2015-10-08 10:24


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Washington - A 48-million-year-old fossil of a pregnant horse and fetus is the oldest of its kind known to science and contains unusually well-preserved evidence of tissue from the womb, researchers said on Wednesday.

The fossil was discovered in Germany in 2000, but the scientific analysis was only now completed and published in the open-access journal PLOS One.

The animal was an early relative of the modern horse - known as Eurohippus messelensis - and would have been about the size of a small dog.

The fetus is about 12.5cm long and is mostly intact, except for a crushed skull.

Scientists believe the mother may have died shortly before she was due to give birth, but that her death was not linked to her pregnancy.

In addition to skeletal remains, researchers "found preserved soft tissue, like the uteroplacenta and one broad uterine ligament, which may represent the earliest fossil record of the uterine system of a placental mammal", said the study.

The finding suggests that the reproductive system of horses has changed little over the course of tens of millions of years.

Read more on:    us  |  animals  |  science

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