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ArchaeologyThis 1.4-million-year-old hand ax adds to Homo erectus’ known toolkit
A newly described East African find, among the oldest bone tools found, shows the ancient hominids crafted a range of simple and more complex tools.
By Bruce Bower -
GeneticsA bacterial toxin enables the first mitochondrial gene editor
Researchers have engineered a protein from bacteria that kills other microbes to change DNA in a previously inaccessible part of the cell.
By Jack J. Lee -
PhysicsThe universe might have a fundamental clock that ticks very, very fast
A theoretical study could help physicists searching for a theory of quantum gravity.
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