Using sea charts and satellites, the effort will trace how the kelp beds are changing in response to global warming and commercial harvesting.
In botanic gardens around the world, the reproductive future of the famously smelly plant is threatened. A new collaborative program wants to save it.
Most claims of running on “clean” electricity come with caveats, and many technologies required for round-the-clock renewable energy aren’t quite ready yet.
John Snow showed that London's cholera outbreak arose from bad water, not the moral failings of the poor. His legacy can help tackle new problems like Covid-19.
As the Trump era wanes, there is a sense of optimism about what the accord could achieve, five years in—but only if countries meet their targets.