The invasion of Ukraine hampered collaboration with Russian climate scientists. That's bad news for our collective ability to understand, and prepare for, a hotter planet.
Microsoft says hackers broke into its corporate email system and accessed the accounts of members of its leadership team, as well as those of employees on its cybersecurity and legal teams.
Ukrainian authorities said 230 Ukrainian prisoners of war returned home in the first exchange in almost five months. Russia's Defense Ministry said 248 Russian servicemen have been freed.
Belarus' authoritarian president attended a government-organized meeting with children brought from Russia-controlled areas of Ukraine, openly defying an international outrage over such deportations.
The U.S. announced military aid of up to $250 million. It could be the final package of military aid to Ukraine unless Congress approves supplemental funding legislation now stalled on Capitol Hill.