Physics

A layer of tiny grains can slow sound waves

In some ways, granular material—such as a pile of sand—can behave much like a crystal, with its close-packed grains mimicking the precise, orderly arrangement of crystalline atoms. Now researchers at MIT have pushed that similarity to a new limit, creating two-dimensional arrays of micrograins that can funnel acoustic waves, much as specially designed crystals can control the passage of light or other waves.

An infallible quantum measurement

For quantum physicists, entangling quantum systems is one of their every day tools. Entanglement is a key resource for upcoming quantum computers and simulators. Now, physicists in Austria and Switzerland have developed a new, reliable method to verify entanglement in the laboratory using a minimal number of assumptions about the system and measuring devices.

NASA Selects Launch Services Contract for OSIRIS-REx Mission

NASA has selected United Launch Services LLC of Englewood, Colo. to launch the Origins-Spectral Interpretation-Resource Identification-Security-Regolith Explorer (OSIRIS-REx) spacecraft.

NASA Begins Launch Preparations for Next Mars Mission

NASA's next spacecraft going to Mars arrived Friday, Aug. 2, at the agency's Kennedy Space Center in Florida, and is now perched in a cleanroom to begin final preparations for its November launch.

NASA Television to Broadcast Two Russian Spacewalks in August

NASA Television will provide live coverage as two Russian cosmonauts venture outside the International Space Station on spacewalks Friday, Aug. 16, and Thursday, Aug. 22. NASA TV coverage will begin at 10 a.m. EDT both days.

Hidden magnetic waves discovered in high-temperature superconductors

Advanced x-ray technique reveals surprising quantum excitations that persist through materials with or without superconductivity.

A crystal of a different color: One chemical forms two colors of crystals, sheds insight on agostic bonds important in industrial catalysis

Chemists have unexpectedly made two differently colored crystals -- one orange, one blue -- from one chemical in the same flask while studying a special kind of molecular connection called an agostic bond. The discovery provides industrial chemical reactions such as those that occur while making plastics and fuels.

NASA's Hubble Finds Telltale Fireball After Gamma Ray Burst

NASA's Hubble Space Telescope recently provided the strongest evidence yet that short-duration gamma ray bursts are produced by the merger of two small, super-dense stellar objects.

Predicted experimental test will clarify how light interacts with matter at high energies

Collisions of atomic and subatomic particles at very high energies reveal important properties about the beginning of the Universe and the atomic forces, and how fundamental particles are formed and react with each other. Adam Bzdak from the RIKEN BNL Research Center and colleague Vladimir Skokov from Brookhaven National Laboratory in the US have now proposed a scheme that allows for a better understanding of how light and subatomic particles react with each other during such high-energy collisions.

NASA's Journey to Tomorrow Traveling Exhibit Featured at Flag City Balloon Fest

Visitors to the Flag City Balloon Fest will be able to explore NASA's Journey to Tomorrow trailer.

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