Study: How placentas evolved in mammals

The fossil record tells us about ancient life through the preserved remains of body parts like bones, teeth and turtle shells. But how to study the history of soft tissues and organs, which can decay quickly, leaving little ...

'Dative epitaxy': A new way to stack crystal films

Scientists have grown thin films of two different crystalline materials on top of each other using an innovative technique called "dative epitaxy." The researchers discovered the method by surprise.

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