Martian lake beds and deltas reveal the Red Planet’s watery past. But many puzzles remain, scientist Bruce Jakosky says.

WASHINGTON – Ukraine agreed to a temporary ceasefire with Russia on Tuesday, negotiators announced from Saudi Arabia. Russia would need to agree to the proposal for it to take effect as a ...

WASHINGTON – War-torn Ukraine, reeling from an Oval Office meltdown between President Donald Trump and leader Volodymyr Zelenskyy, will get a do-over Tuesday when its negotiators meet with ...

Ukrainian President Volodymyr Zelensky said Tuesday that Ukraine had accepted a 30-day ceasefire proposed by the United States, following critical peace talks between US and Ukrainian officials in ...

Ukraine’s minerals have become central to ... This is the extraction from salt solutions, such as seawater or saline lakes, which can be more expensive than hard-rock mining.

Russian strikes on Ukraine killed at least 20 people, officials said Saturday, as heavy aerial attacks continued after the U.S. stopped sharing satellite images with Ukraine. The decision to ...

FOR TEN DAYS, since the shouting-match in the Oval Office, Ukraine has been scorched by Donald Trump’s wrath. Now comes a moment of catharsis—or another round of brutal punishment. On March ...

The strikes come a day after the U.S. paused intelligence sharing with Ukraine. LONDON -- At least 20 people have died and 55 are injured as the casualties continue to rise Saturday following an ...

The United States and Ukraine have reached an agreement to resume US military aid, along with resuming intelligence sharing, the two countries said Tuesday. Ukraine also agreed to a proposed ...

Russia is willing to discuss a temporary truce in Ukraine provided there is progress toward a final peace settlement, according to people familiar with the matter in Moscow. In the first signal of ...

Ukraine uses the technology to track the movement of Russian troops and assess damage to infrastructure. By Eve Sampson A Pentagon agency said on Friday that it had “temporarily suspended” the ...

Secretary of State Marco Rubio in a Wednesday interview described the war in Ukraine as a proxy war between the United States and Russia, as he sought to explain on the Oval Office blowup last ...