Three human-like species lived side-by-side in ancient Africa

Two million years ago, three different human-like species were living side-by-side in South Africa, a study shows. The findings underline a growing understanding that the present-day situation, where one human species dominates the globe, may be unusual compared with the evolutionary past. The new


Scientists Say: Fermentation

Fermentation (noun, “FUR-men-TAY-shun”)This word describes a process by which living things break down carbohydrates to make other molecules and provide energy to cells or organs. Carbohydrates are common compounds in food and include sugars and starches Some microbes use fermentation to


Coronavirus is most contagious before and during the first week of symptoms

As sweeping efforts to contain the COVID-19 pandemic go into effect around the globe, researchers are starting to get hints of just when patients are most contagious. People infected with the SARS-CoV-2 virus, which causes the disease, may test positive for the virus both before and after they have


Robots, clocks and computers: How Ancient Greeks got there first

A humanoid figure dressed as a maid holds a jug in its right hand and, as hidden gears click and whirr, lifts it and pours wine into a cup a bystander has placed into the palm of its left.The robot is a recreation of the automatic servant of Philon, designed more than 2,200 years ago by a Greek engi


Scientists find evidence of 'ghost population' of ancient humans

Scientists have found evidence for a mysterious “ghost population” of ancient humans that lived in Africa about half a million years ago and whose genes live on in people today. Traces of the unknown ancestor emerged when researchers analysed genomes from west African populations and fo





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