How does a cell know when it’s been damaged? A molecular alarm, set off by mutated RNA and colliding ribosomes, signals danger. When the sun shines on your skin, what does it hit? When it causes a ...

A strand of RNA just 45 nucleotides long has been discovered to perform two key reactions required for self-replication. The ...

Ancient DNA has been pulled from a permafrost-preserved woolly mammoth found in Siberia, and scientists are thrilled. They recovered and sequenced RNA, a fragile molecule that many biologists assumed ...

In 2010, tusk hunters scouring a riverbank near Siberia’s Arctic coast discovered the mummy of a juvenile mammoth. The animal, nicknamed “Yuka” after the nearby village of Yukagir, had been frozen for ...