A sandwich of two graphene layers can conduct electrons without resistance if they are twisted at a ‘magic angle’’, physicists have discovered. The finding could prove to be a significant step in the decades-long search for room-temperature superconductors.
Source: nature.com
Since the ’50s, scientists have chased the promise of clean energy from sun-like reactions between deuterium and tritium, the plentiful isotopes of hydrogen. This carbon-free energy, achieved at temperatures of 360 million degrees Fahrenheit, would offer a great way to heat water and, in turn, spin turbines to create countless kilowatts of electricity.
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In a world-first, an ESA-led team has built and fired an electric thruster to ingest scarce air molecules from the top of the atmosphere for propellant, opening the way to satellites flying in very low orbits for years on end.
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Imagine traveling the length of the United Kingdom—from London to Edinburgh, 400-plus miles—in under an hour. A journey from Los Angeles to San Francisco would take less than 30 minutes (five hours less than the average drive between the two cities). Your journey would be safe and comfortable, your carbon footprint almost non-existent.
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