Chemistry
- Health & Medicine
Readers respond to antibiotics, carbon bonds and more
Allergic overreactions, the possibility of silicon-based life and more in reader feedback.
- Earth
Oxygen flooded Earth’s atmosphere earlier than thought
The Great Oxidation Event that enabled the eventual evolution of complex life began 100 million years earlier than once thought, new dating of South African rock suggests.
- Chemistry
LSD’s grip on brain protein could explain drug’s long-lasting effects
The newly discovered structure of a human serotonin receptor linked to LSD could reveal why the drug’s hallucinogenic effects last so long.
- Physics
Chemists strike gold, solve mystery about precious metal’s properties
A longstanding puzzle about gold’s properties has been solved with more complex theoretical calculations.
- Chemistry
New molecular knot is most complex yet
The knot is woven from 192 atoms of carbon, hydrogen, oxygen and nitrogen and forms a triple braid with eight crossing points.
- Chemistry
Better batteries charge forward
Next-generation batteries must hold more energy for longer periods at low cost. Several contenders may achieve some of these elusive goals.
- Physics
New form of hydrogen created
Scientists have created negatively charged clusters of hydrogen for the first time.
- Chemistry
Debate heats up over claims that hot water sometimes freezes faster than cold
A team of chemists has a new explanation for the Mpemba effect, while other scientists debate if it is even real.
- Chemistry
Carbon can exceed four-bond limit
Scientists confirm structure of unusual molecule in which carbon bonds to six other carbon atoms.
- Planetary Science
First signs of boron on Mars hint at past groundwater, habitability
The Curiosity rover has found the first signs of boron on Mars, which could hint at past habitable groundwater.
- Planetary Science
First signs of boron on Mars hint at past groundwater, habitability
The Curiosity rover has found the first signs of boron on Mars, which could hint at past habitable groundwater.
- Life
Early RNA may have used isolation strategy to defeat useless mutants
Temporary barriers help RNA escape shorter, faster-replicating parasites
