An extremely hot ash cloud from the eruption of Mount Vesuvius turned human brain tissue into glass, study finds
The eruption of Mount Vesuvius 2,000 years ago turned a victim’s brain tissue into glass. Scientists say they have figured ...
The New York Times13h
What’s Going On in This Picture?
Look closely at this image, stripped of its caption, and join the moderated conversation about what you and other students see. By The Learning Network Look closely at this image, stripped of ...