(Phys.org) —Physicists William Irvine and Dustin Kleckner of the University of Chicago, have for the first time, created a knotted vortex in a fluid. They describe how they printed 3D airfoils and then accelerated them very quickly in a tank of bubble-filled water to accomplish this feat in their paper published in the journal Nature Physics.

Students in California will speak with Expedition 34 astronauts aboard the International Space Station Tuesday, March 5, at Monrovia High School near Los Angeles. News media representatives are invited to attend.

NASA has selected Paragon Tec Inc. of Cleveland to support educational programs at the agency's Glenn Research Center in Cleveland, NASA Headquarters in Washington, and other NASA centers, as necessary.

NASA has selected Wyle Laboratories Inc. of Houston to provide biomedical, medical and health services in support of all human spaceflight programs at the agency's Johnson Space Center in Houston.

NASA has selected three companies to provide engineering solutions and products to Marshall Space Flight Center in Huntsville, Ala.

Students in California will speak with Expedition 34 astronauts aboard the International Space Station Tuesday, March 5, at Monrovia High School near Los Angeles. News media representatives are invited to attend.

The Suomi National Polar-orbiting Partnership (NPP) satellite, a partnership between NASA and the National Oceanic and Atmospheric Administration (NOAA), was transitioned to NOAA operational organization control Feb. 22. The transition marks the next step of the mission that supports NASA's Earth science research and NOAA's weather forecasting missions.

NASA has selected Science Applications International Corporation (SAIC) of McLean, Va., to provide safety, health, environmental and mission assurance services at the agency's Glenn Research Center in Cleveland and Plum Brook Station in Sandusky, Ohio.

NASA has selected Paragon Tec Inc. of Cleveland to support educational programs at the agency's Glenn Research Center in Cleveland, NASA Headquarters in Washington, and other NASA centers, as necessary.

Researchers have applied a recently developed technique to directly measure for the first time the polarization states of light. Their work both overcomes some important challenges of Heisenberg's famous Uncertainty Principle and also is applicable to qubits, the building blocks of quantum information theory.