Researchers Debate Theory of Pyramids’ Construction, Astronauts Are Stuck in Space, and Olympians Swim the Seine

We cover the science stories of the Olympics, concerns about artificial sweeteners and a new theory of how the pyramids were built in this week’s news roundup.

 We cover the science stories of the Olympics, concerns about artificial sweeteners and a new theory of how the pyramids were built in this week’s news roundup.  Scientific American Content: Global