The circle, named Kostenki 11, was about 40 feet in diameter with no obvious entrance.
The Russian president said he had been advised to use doubles, especially at the start of the century when there were a number of terror attacks.
On December 18, Moscow recorded a temperature of 5.4 degrees celsius or 41.72 degrees fahrenheit, breaking a high tempearture record from 1886.
Alisa Yarovskaya from the Yamal Region television channel asked Putin a question during his news conference in Moscow last week.
The Russian president took questions for four hours and 18 minutes his annual televised press conference.
"Vaccine opponents' blood can be very dangerous," the doctor tells the vampire father and daughter in the clip.
Ex-Navy intelligence officer Malcom Nance's comments seemed to be well-received by 'Morning Joe' co-host Willie Geist.
The highway through the south of the Russian capital goes past a former metals processing site and could scatter radioactive particles into the air, the environmental group has warned.
A Russian women's rights activist wants a federal ban of facial recognition technology in Moscow following political protests in the city.
"The policeman would have been rewarded for that too."
The victim can be seen in video footage clutching his still-burning neck and stumbling around on the highway.
"I definitely don't need this sh--storm, so dear friends: I'm deleting this video so as not to prolong this wave of negativity," Russian rapper Timati wrote.
The official, since named by Russian media, had reportedly been supplying intelligence to the U.S. for decades.
Anti-government protesters have been marching against a ban on some opposition parties in the upcoming Moscow city parliament elections.
"You are single-handedly putting our democracy at risk. This is why the people are calling you Moscow Mitch," ex-Trump supporter David Weissman wrote.
The Ural Airlines Airbus 321 was heading to Simferopol in Crimea before crash-landing just outside the Zhukovsky International Airport shortly after takeoff.
The footage has sparked anger among many, who have accused authorities of using excessive force in breaking up a demonstration in Moscow.
An eyewitness captured the aftermath of the crash on camera.
Russian Foreign Ministry spokesperson Maria Zakharova said the U.S. Embassy in Moscow promoted the march by posting a map of its planned route online.
Guitarists Paul Landers and Richard Kruspe were seen moving towards one another before kissing during a performance of "Aüslander."
"We are afraid of the delayed effects of any damage," said Navalny's doctor after his detention following widespread protests in Moscow.
Dmitry Zakharchenko was sentenced to 13 years in a maximum security correctional facility and slapped with a fine of around $1.8 million.
"Considering that we have met over the past two weeks for two times, that's a reason for some optimism," Russian Foreign Minister Sergey Lavrov told Secretary of State Mike Pompeo.
The subpoena was the first to target a member of the president's family.
Images and videos of the Aeroflot Flight SU1492 were shared online, showing flames and smoke shooting from the aircraft as passengers and crew escaped using emergency slides from the plane.
"This is not an issue for us, it is not a thing that interests us or causes us concern," Kremlin spokesman Dmitry Peskov said.
"During the Cold War, we understood each other's signals. We talked," U.S. Army General Curtis Scaparrotti said. "I'm concerned that we don't know them as well today."
"The hand of 'democracy' squeezes the throat of freedom," Russian Foreign Ministry spokesperson Maria Zakharova wrote on Facebook.