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Though discarded after birth, the placenta builds the first vital connection between mother and fetus.
Sediment cores from around the Yucatán Peninsula support a theory as to what could have led to the Mayans' demise.
A museum curator has discovered a box of beetles containing specimens collected during a famous expedition.
While people in a vegetative state appear physically unresponsive, a new study reveals that some might be aware to a degree.
A special imaging technology peers inside a mouse eye, revealing the distinct roles that cells play in maintaining retinal health.
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