Russia begins production of S-400 missiles sold to Turkey
Putin: “We decided to shorten the duration of S-400 missiles’ delivery to Turkey during our meeting”
Autonomous sub finds long-lost supersonic aircraft from the 50s? (PHOTOS)
The aircraft was discovered by an Autonomous Underwater Vehicle (AUV)
There’s only so much time left to look for life on Mars before life arrives from Earth
The 51-year-old Outer Space Treaty, which obligates the U.S. and other signers to avoid the “harmful contamination” of other celestial bodies
