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Front Matter
Topology could help better connect the people and places in these chaotic communities. But some who’ve studied slums and their multifaceted origins fear that applying such mathematical approaches won’t help, and could even make the problem worse.
Image credit: Shutterstock/Moobatto.
After an infamous case of astronomical mistaken identity, new telescopes are helping to pick up the trail in hopes of finding these ripples in the fabric of spacetime that were produced just after the Big Bang.
Image credit: Anil Ananthaswamy.
In the News
Previous research has suggested that women tend to be more risk-averse than men, but a study suggests that gender differences in risk preferences are shaped by culture and can be influenced by the environment.
Image courtesy of Pixabay/Clker-Free-Vector-Images.
Researchers report an electrode for electrolysis of seawater to hydrogen and oxygen that could be used in conjunction with solar cells to convert solar energy into hydrogen and oxygen without the need for desalination.
Image courtesy of Pixabay/Pexels.
A study of ancient urban trash mounds in the Byzantine settlement of Elusa in the Negev Desert of the southern Levant suggests a link between climate change and Late Antique urban collapse.
Image courtesy of Guy Bar-Oz.
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A paleontological site preserves the immediate aftermath of the asteroid impact that may have caused a global mass extinction.
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PNAS Profile of NAS member and cancer biologist Daniel Haber
Image courtesy of Mark Karlsberg (Studio Eleven, Newton, MA).
