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As Brazil’s environment minister, Marina Silva helped to rein in rampant deforestation and rebuild institutions that were weakened by the previous government.
Ten years after cannabis was first legalized for casual use in adults, scientists are struggling to provide evidence-based recommendations about the risks to young people.
Ancient humans painted scenes in Indonesian caves more than 45,000 years ago, but their art is disappearing rapidly. Researchers are trying to discover what’s causing the damage and how to stop it — before the murals are gone forever.
An advocacy group is pushing for more ‘human challenge’ trials to spur vaccine discovery. Following COVID-19 and Zika studies, hepatitis C could be next.
Chances are rapidly disappearing to limit Earth’s temperature rise to the globally agreed mark, but researchers say there are some positive signs of progress.