Did adaptive radiations shape reptile evolution?

Some of the most fundamental questions in evolution remain unanswered, such as when and how extremely diverse groups of animals—for example reptiles—first evolved. For seventy-five years, adaptive radiations—the relatively ...

Smiling baby monkeys and the roots of laughter

When human and chimp infants are dozing, they sometimes show facial movements that resemble smiles. These facial expressions—called spontaneous smiles—are considered the evolutionary origin of real smiles and laughter.

Study offers insight into the origin of the genetic code

An analysis of enzymes that load amino acids onto transfer RNAs—an operation at the heart of protein translation—offers new insights into the evolutionary origins of the modern genetic code, researchers report. Their ...

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