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Mars Exploration Fast Facts Here’s some background information about Mars exploration. The United States and the Soviet Union are the only two countries to land a spacecraft on Mars. Facts There have been nine successful US Mars landings: Viking 1 and Viking 2 (both 1976), Pathfinder (1997), Spirit and Opportunity (both 2004), Phoenix (2008), Curiosity (2012), InSight (2018) and Perseverance (2021). The only other country to land a spacecraft on Mars was the Soviet Union in 1971 and 1973. The United States, the Soviet Union, the European Space Agency and India have successfully sent spacecr...

"Are we alone in the universe?" is the question humans have been asking for time immemorial as they gaze up into night sky. Hundreds of alleged sightings of UFOs appear...

Good morning, Arizona. Here's what you need to know to start your day.

Today’s highlight May 25, 2020: George Floyd, a Black man, died when a white Minneapolis police officer pressed his knee on Floyd’s neck for about 9 1/2 minutes while Floyd was handcuffed and pleading that he couldn’t breathe; Floyd’s death, captured on video by a bystander, would lead to worldwide protests, some of which turned violent, and a reexamination of racism and policing in the U.S. On this date 1787: The Constitutional Convention began at the Pennsylvania State House (Independence Hall) in Philadelphia after enough delegates had shown up for a quorum. 1935: Babe Ruth hit h...

Flight Test Files: Martin B-57B Canberra Flight Test Files: Martin B-57B Canberra In this NASA Ames-Dryden Flight Research Facility photograph taken in 1982 the B-57B Canberra is shown making atmospheric measurements near a mountain range The Martin B-57B Canberra light bomber was used on several flight test programs at the NASA Flight Research Center and other NASA Centers. The two-seated aircraft was powered by two J56-W-5 turbojet engines. The atmospheric part of the research program provided information on mountain waves, jet streams, convective turbulence, and atmospheric contaminants. D...