A joint European-Japanese spacecraft got its first glimpse of Mercury as it swung by the solar system’s innermost planet while on a mission to deliver two probes into orbit in 2025.  The BepiColombo mission made the first of six flybys of Mercury at 11:34 p.m. GMT Friday, using the planet’s gravity to slow the spacecraft down.  After swooping past Mercury at altitudes of under 200 kilometers (125 miles), the spacecraft took a low-resolution black-and-white photo with one of its monitoring cameras before zipping off again.  The European Space Agency said the …

In a normal year, the smokehouses and drying racks that Alaska Natives use to prepare salmon to tide them through the winter would be heavy with fish meat, the fruits of a summer spent fishing on the Yukon River like generations before them.  This year, there are no fish. For the first time in memory, both king and chum salmon have dwindled to almost nothing and the state has banned salmon fishing on the Yukon, even the subsistence harvests that Alaska Natives rely on to fill their freezers and pantries …

Delegates heading to the COP26 U.N. climate summit in Glasgow agreed they must deliver on the $100 billion per year pledge to help most vulnerable nations tackle climate change, COP26 president Alok Sharma said on Saturday.   Speaking after days of meetings at the pre-COP26 climate event in Italy, Sharma said there was a consensus to do more to keep the 1.5 degrees Celsius target within reach, adding more needed to be done collectively in terms of national climate plans.   The COP26 conference in Glasgow aims to secure more …

The abortion rights battle takes to the streets across America Saturday, with hundreds of demonstrations planned as part of a new “Women’s March” aimed at countering an unprecedented conservative offensive to restrict the termination of pregnancies.   The fight has become even more intense since Texas adopted a law on September 1 banning almost all abortions, unleashing a veritable legal guerrilla warfare and a counterattack in Congress, but with few public demonstrations until now.   Two days before the U.S. Supreme Court, which will have the final say on the …

Droughts that cause leaves to turn brown and wither before they can reach peak color. Heat waves prompting leaves to fall before autumn even arrives. Extreme weather events like hurricanes that strip trees of their leaves altogether. For a cheery autumnal activity, leaf peeping is facing some serious threats from the era of climate change. Leaf peeping, the practice of traveling to watch nature display its fall colors, is a beloved annual activity in many corners of the country, especially New England and New York. But recent seasons have been …

At the virtual COVID-19 summit on the margins of the U.N. General Assembly last week, U.S. President Joe Biden announced an additional donation of 500 million doses of the Pfizer vaccine to low-income and lower-middle-income countries, bringing total U.S. pledged donations to 1.1 billion shots. “I made — and I’m keeping — the promise that America will become the arsenal of vaccines as we were the arsenal of democracy during World War II,” Biden said at the summit. Here are some facts and context surrounding that claim. How many doses …