Uncategorized
- Earth
Trees mark the spot of buried gold
Tiny bits of the precious metal in eucalyptus leaves indicate treasure lurks belowground.
-
- Environment
Feedback
Readers respond to "Solving soot," trade-offs of horn size for male Soay sheep and the huge galactic explosion story from 50 years ago.
- Physics
Oldest pitch-drop experiment
The allure of pitch — a black tarlike hydro-carbon by-product of distilling petroleum, wood or coal — comes from its split personality: It shatters from a quick hit with a hammer, but flows if set aside for long periods.
