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Ancient DNA preserved in the tooth tartar of human fossils encodes microbial metabolites that could be the next antibiotic. Werner/Siemens Foundation

Reconstructing ancient bacterial genomes can revive previously unknown molecules – offering a potential source for new antibiotics

Ancient microbes likely produced natural products their descendants today do not. Tapping into this lost chemical diversity could offer a potential source of new drugs.
Cloud seeding can increase rainfall and reduce hail damage to crops, but its use is limited. John Finney Photography/Moment via Getty Images

Cloud seeding can increase rain and snow, and new techniques may make it a lot more effective – podcast

Cloud seeding – spraying materials into clouds to increase precipitation – has been around for nearly 80 years. But only recently have scientists been able to measure how effective it really is.
The stress of experiencing high levels of community violence harms entire families. skynesher/E+ via Getty Images

Black mothers trapped in unsafe neighborhoods signal the stressful health toll of gun violence in the U.S.

Chronic stress from living with systemic racism and gun violence can lead to increased symptoms of PTSD and depression as well as elevated cortisol levels.