Ant study sheds light on the evolution of workers and queens

Worker ants, despite their diligence, seldom encounter opportunities for social mobility. In many species, individuals adhere to strict caste roles: queens lay eggs and workers take care of almost everything else, including ...

Deep in the fly brain, a clue to how evolution changes minds

For lovers throughout the animal kingdom, finding a suitable mate requires the right chemistry. Now, scientists at The Rockefeller University have been able to map an unexpected path in which evolution arranged for animals ...

A first look at the earliest decisions that shape a human embryo

The factors that shape the destiny of a cell, like that of a fully formed person, remain something of a mystery. Why, for example, does one stem cell in a human embryo become a neuron rather than a muscle cell? And why does ...

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