A remarkable 4,000-year-old defensive structure discovered in Morocco is rewriting what scientists thought they knew about ancient North African civilizations. The massive fortifications reveal unexpectedly sophisticated prehistoric societies and suggest that the region played a much greater role in Mediterranean history than previously recognized.
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Most people never regret just staying silent. The post How to keep your mouth shut in conversations when you know you should really stay quiet appeared first on Upworthy.
Scientists at Johns Hopkins have uncovered a crucial missing link between a common gut bacterium and colorectal cancer, solving a mystery that has puzzled researchers for nearly two decades. The bacterium, Bacteroides fragilis, produces a toxin that damages the colon’s protective lining, triggers chronic inflammation, and promotes tumor formation.
The meteorite, discovered in the Sahara desert in Mali, may be the oldest among Martian rocks found on Earth. Its composition provides evidence that water seeped into the planet's crust billions of years ago, and strengthens the hypothesis that ancient Mars could have been suitable for life.
