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Javelin anti-tank missiles, T-72 tanks and Bayraktar TB2 drones are just some of the weapons that other nations have sent to Ukraine. Getty Images, Associated Press, Wikimedia Commons, U.S. Department of Defense

Ukraine receives weapons support from around the world

An arms trade expert explains the wide variety of military aid nations around the world have sent to Ukraine.
Co-author Chloe Gustafson and mountaineer Meghan Seifert install measuring equipment on an ice stream. Kerry Key/Lamont-Doherty Earth Observatory

Scientists in Antarctica discover a vast, salty groundwater system under the ice sheet – with implications for sea level rise

Liquid water below the ice determines how fast an ice stream flows. As the ice sheet gets thinner, more of that salty groundwater could rise.
Many places have banned sunscreens with certain chemicals in an attempt to help protect coral reefs. Westend61 via Getty Images

Corals and sea anemones turn sunscreen into toxins – understanding how could help save coral reefs

Researchers have long suspected that an ingredient in sunscreen called oxybenzone was harming corals, but no one knew how. A new study shows how corals turn oxybenzone into a sunlight-activated toxin.
The threat of expensive payouts may already be having an effect. Tom Stoddart/Getty Images

How treaties protecting fossil fuel investors could jeopardize global efforts to save the climate – and cost countries billions

A new study adds up the potential legal and financial risk countries could face from hundreds of agreements, like those under the Energy Charter Treaty.
Anti-abortion protesters use bullhorns to counter abortion rights advocates outside the Supreme Court on May 3, 2022. Bonnie Jo Mount/The Washington Post via Getty Images

If Roe v. Wade is overturned, there’s no guarantee that people can get abortions in liberal states, either

25 states aren’t expected to ban abortion if the Supreme Court overturns Roe v. Wade. But limits on abortion in these places, too, make it an uncertain refuge for people seeking abortions elsewhere.
Nanoparticles can help cancer drugs home in on tumors and avoid damaging healthy cells. Kateryna Kon/Science Photo Library via Getty Images

Nanoparticles are the future of medicine – researchers are experimenting with new ways to design tiny particle treatments for cancer

The COVID-19 mRNA vaccines put nanomedicine in the spotlight as a potential way to treat diseases like cancer and HIV. While the field isn’t there yet, better design could help fulfill its promise.
Since the mid-1990s, people have been doing less and less walking or bicycling to work and school and spending a lot more time staring at screens. RainStar/E+ via Getty Images

A boom in fitness trackers isn’t leading to a boom in physical activity – men, women, kids and adults in developed countries are all moving less

Research is revealing that fitness trackers alone can be helpful facilitators toward changing a sedentary lifestyle but don’t motivate people to increase their physical activity.