Researchers have no idea how the observatory could have disappeared.
And climate change is halting recovery efforts.
The move was prompted by the “security situation” in the Baltic Sea.
Being on a ferry that sails from Sweden to Finland with bottomless wine on tap and all-you-can-eat shrimp sounds like a dream. But is it, really?
You can hear one sailor on the USS Donald Cook say "Oh my God!" as a Russian Sukhoi Su-24 fighter jet makes extremely close passes by the destroyer.
According to Swedish security forces, Russian spies are actively trying to prevent Sweden from ratifying an agreement that would cement stronger NATO ties.
The US military on Wednesday released photos and videos of the incidents, which an unnamed US official described as one of the most aggressive interactions between the two countries in recent memory.
Sweden and Finland may be getting closer to joining the North Atlantic Treaty Organization as Russia continues its aggressive posturing in the Baltic Sea.
A glimpse of the Baltic Sea’s 'dead zones.'
Russian aggression in Ukraine and military adventures in the Baltics are pushing Sweden to abandon its long-standing neutrality.
Can the Baltic breathe again?