A rise in US visa denials for Chinese academics and intensified scrutiny of alleged links to Beijing over fears of potential espionage are having a chilling effect on long-standing research collaboration, researchers say. American and Chinese scientists have co-authored thousands of papers each year, far outpacing the output from scientific collaborations between any other two nations, according to a 2018 survey by academic database Nature Index.
Unfortunately, “bias” can mean a great many things, none of which are quite the same. Sometimes, people use simply to refer to two groups that are unequal. Sometimes it means prejudice. Sometimes, it means discrimination. How these ideas, or claims, are related yet different is beyond the scope of this essay, which, instead, deals only with gender bias.
A new study suggests that complex alien life -- the sort of life we could one day meet and potentially communicate with -- might be present on far fewer worlds than previously thought, due to the toxic presence of so much CO2 on certain planets that are otherwise within the Habitable Zone (HZ) of their respective stars.
The dossier on cancer researcher Xifeng Wu was thick with intrigue, if hardly the stuff of a spy thriller. It contained findings that she’d improperly shared confidential information and accepted a half-dozen advisory roles at medical institutions in China. She might have weathered those allegations, but for a larger aspersion that was far more problematic: She was branded an oncological double agent.
Scientific literacy - the understanding of scientific concepts and processes - is a major goal of K-12 schooling. The National Science Education Standards, established to guide science education in primary and secondary schools, say the knowledge is necessary “for personal decision making, participation in civic and cultural affairs, and economic productivity.”
If you ever clean out the gutters on your roof, take note: The dirt you’re tossing may have come from outer space. “In an average day, about 100 tons of meteor dust falls on the planet,” May writes. “One of the best places to find it is on non-porous surfaces like city rooftops and gutters . . . The sludge in your gutter almost certainly contains a few particles that came from outer space.”
Scientists studying the moon have made an unexpected discovery. While we have good data on the surface topography, there’s still a lot we don’t know about what lies beneath the craggy craters and dunes. A large crater in the southern polar region appears to contain a large deposit of dense material, possibly the remains of an ancient metallic asteroid.
The effective diameter of the Terahertz Space Telescope, Walker says, would be about 25 meters. To put this in perspective, the James Webb Space Telescope--which is slated to launch in 2021, and will be the most sensitive telescope ever sent to space--has an aperture of about 6.5 meters. The price difference is even more dramatic: Walker estimates the inflatable telescope would cost around $200 million to send to orbit, whereas the James Webb telescope is expected to cost about $10 billion by the time it’s launched.
NASA is just over a year away from the launch of the Mars 2020 rover, and all systems are go for the rover’s flying passenger. After completing its flight test early this year, the Mars Helicopter Scout (MHS) is undergoing final preparation and could join the rover this summer. If it works as planned, the MHS will be the first flying machine on another planet.
An almost unlimited supply of electricity could be generated on the moon’s surface by huge arrays of solar cells and beamed to Earth by laser. Sunlight falling on a crater … could produce from 10,000 to 100,000 megawatts of power.