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The destroyed fuel station in Stoyanka, Ukraine. Putin has been laying the rhetorical groundwork for the invasion of Ukraine for years. Anastasia Vlasova/Getty Images

Using lies and disinformation, Putin and his team have been building the case for a Ukraine invasion for 14 years

Putin’s rationale for invading Ukraine wasn’t built over just a few months in 2021. Putin and high-level Russia government staff have been trash-talking Ukraine for more than a decade.
Bees feeding in monoculture fields of single crops such as sunflowers crowd together and pass parasites to one another at high rates. Lauren Ponisio/University of Oregon

Planting mixes of flowers around farm fields helps keep bees healthy

Huge single-crop fields attract bees in such numbers that they spread parasites to one another. Planting diverse mixes of flowers around fields helps spread out pollinators and keep them healthy.
While the vast majority of primary care providers have higher confidence in vaccines than the general public, some do not. Evgeniy Shkolenko/iStock via Getty Images Plus

The 1 in 10 U.S. doctors with reservations about vaccines could be undermining the fight against COVID-19

Many COVID-19 vaccination campaigns encourage doctors to serve as a trusted source of vaccine information. But certain vaccine-hesitant providers may stymie these efforts.
There is little evidence that Russia has coordinated cyber operations with conventional military operations in Ukraine. Russian Defense Ministry Press Service via AP

Cyberattacks have yet to play a significant role in Russia’s battlefield operations in Ukraine – cyberwarfare experts explain the likely reasons

Cyberattacks can be devastating, just not on the battlefield, according to researchers who looked at 10 years of armed conflicts around the world.
Supporters of Ukraine, like these demonstrators in Boston on Feb. 27, 2022, are likely to be disappointed by any peace deal. Vincent Ricci/SOPA Images/LightRocket via Getty Images

Lessons in realpolitik from Nixon and Kissinger: Ideals go only so far in ending conflict in places like Ukraine

The US frequently chooses to put its own interest ahead of its professed values. That approach to foreign policy is called ‘realpolitik’ and it may lead to an unsatisfying peace deal in Ukraine.
International Committee of the Red Cross workers prepare bags with bodies of government soldiers to be handed over in Donetsk, eastern Ukraine, in 2015. AP Photo/Mstyslav Chernov

Humanitarian aid workers need security, rights and better pay

Nearly all of the 129 aid workers killed on the job in 2021 were from the countries where they lost their lives.
Magnetic fusion reactors contain super hot plasma in a donut-shaped container called a tokamak. dani3315/iStock via Getty Images

Nuclear fusion hit a milestone thanks to better reactor walls – this engineering advance is building toward reactors of the future

In January 2022, the JET fusion experiment produced more power over a longer period of time than any past attempt. Two physicists explain the engineering advancements that made the result possible.
Pluto, the largest of the dwarf planets. This image was taken by NASA’s New Horizons spacecraft. NASA/JHUAPL/SwRI

What is a dwarf planet?

The dwarf planets in our Solar System are cold, dark, far away and full of surprises.
Pope Francis presides over a special prayer in St. Peter’s Basilica at the Vatican on March 25, 2022, before heading out to Malta for a two-day visit. AP Photo/Gregorio Borgia, File

Pope Francis’ visit to Malta highlights the role of St. George Preca, an advocate for teaching the gospel

Malta’s St. George Preca was canonized in 2007. Pope Francis’ visit to Malta renewed attention on Preca’s life and work and how it could provide guidance for the welfare of refugees.
A U.S. Air Force jet performs a test drop of a B61-12 bomb in December 2021. That bomb can contain a nuclear warhead for use in wartime. Los Alamos National Laboratory

What countries have nuclear weapons, and where are they?

Both the Russian and US arsenals boast thousands of nuclear weapons, located in various places around their own countries and, for the US, in Europe as well.
U.S. universities are cutting ties with their Russian counterparts, such as Moscow State University, shown here. Alexander Nemenov/AFP via Getty Images

The war in Ukraine ruins Russia’s academic ties with the West

Decades of collaboration between Western and Russian universities have come to a halt because of the war in Ukraine. An expert on U.S.-Russia relations explains what’s at stake.
‘Le Régime du corps’ described a variety of ways to maintain health by keeping the body in balance. The Bute Painter, circa 1285, MS Arsenal 2510, © Bibliothèque nationale de France

Medieval illustrated manuscripts reveal how upper-class women managed healthy households – overseeing everything from purging, leeching and cupping to picking the right wet nurse

This illustrated health manual dating back to the 13th century provides a glimpse of daily life in aristocratic households during the Middle Ages.