To measure airflow and sound, research teams at the NASA Glenn Research Center use special instrumentation like particle image velocimetry, hot wire anemometry, Raman spectroscopy, microphones in phased arrays or continuously rotating rakes. The global aviation noise reduction community relies on data from NASA GRC experiments to validate theory and noise prediction software. Hear an
Snakes will bite, rattle their tails, and even spit venom to escape danger. But of all the world’s species, southeast Asia’s dwarf reed snake (Pseudorabdion longiceps) relies on an especially fascinating escape method. When threatened, the diminutive serpent rolls away like a speeding wheel. An adult dwarf reed snake typically measures less than 12 inches
October is officially Bat Appreciation Month. In the spirit of the season and conservation, a team of biologists in California recently spent time finding bats at Muir Woods National Monument and Samuel P. Taylor State Park. And while Halloween is fast approaching, the activity had nothing to do with spooky festivities and everything to do
On 29 August 2005, Hurricane Katrina made landfall in southeast Louisiana as a Category 3 storm, with sustained winds of 205 kilometres per hour and a storm surge reaching between 4.6 and 5.8 metres in eastern New Orleans. The storm remains one of the deadliest ever to hit the United States, with millions of people
Artificial-intelligence systems such as large language models (LLMs) can exhibit behaviour that seems strikingly intelligent. This has led many people, including some experts, to wonder whether these systems could have some form of consciousness — the capacity for subjective experience. However, we think that existing AI systems are not conscious, and that, along current trajectories
How does a country get the biggest bang for its buck when it comes to science? Comparing science systems between countries can be a good way to see what’s working well and what’s not. But it’s difficult to do. Want to speed up scientific progress? First understand how science policy works Different countries analyse different