Stories by Freda Kreier

The first large trial of a COVID and flu vaccine combo suggests it boosts immune protection even more than single-target shots

Reluctance to talk about bathroom breaks can make fieldwork uncomfortable and even dangerous. Some scientists want that to change

Improved DNA analysis has updated thinking on the skin color, ancestry, and more of the alpine mummy known as Ötzi the Iceman

A multiyear project studying stray dogs around Chernobyl aims to uncover the health effects of chronic radiation exposure

Using modern human DNA to estimate when new generations were born over 250,000 years, scientists suggest that fathers have been having children later in life than mothers throughout human history

Scientists have long known that ancient people living in Siberia made their way into what is now North America. Mounting DNA evidence suggests migration also happened in the opposite direction

DNA from Denisovans, an extinct human species, that was found in the genomes of Indigenous Papuans may mold their immune system

Last-mile delivery by a small drone takes much less energy per package than delivery by diesel truck

The model suggests that a shift in weather patterns in southern Africa might have contributed to the rise of Homo sapiens

Just 14 cases of the scourge that once infected millions of the world’s poorest people were reported last year. But infections in animals complicates efforts to stamp it out

It took just four months to reach this global milestone, and hitting the two-billion mark could happen even faster, say scientists