Understand space, machines, infrastructure and the engineering ideas that turn difficult problems into working systems.
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Learn what snow drought means, the difference between dry and warm snow drought, how snow water equivalent works, and why low mountain snowpack can reduce reservoir inflows.
Learn how GX 301-2 captures part of Wray 977’s stellar wind, how temporary accretion forms, and how XRISM spectroscopy revealed plasma falling toward the pulsar.
What is a brown dwarf? Webb has identified objects in IC 348 with masses around twice Jupiter's, helping astronomers test how the smallest star-like bodies form.
NASA has activated Roman's 300-megapixel Wide Field Instrument in space. Learn how its 18 detectors, wide field of view and infrared sensitivity enable enormous astronomical surveys.
Mercury is relatively close to Earth, yet placing a spacecraft in orbit there is extraordinarily difficult. Here is how BepiColombo uses gravity assists, efficient propulsion and careful braking to arrive.
Learn why auroras glow green, red, blue, pink and purple, how oxygen and nitrogen create the colours, and why auroras can be more active near equinoxes.
Learn what an analemma is, why the Sun traces a figure eight over a year, and how Earth’s axial tilt, elliptical orbit, solstices and equinoxes create the pattern.
Learn how access tokens work, how stolen tokens can be misused to hijack authenticated sessions, and the practical security controls NIST and CISA recommend.
The equinox is often described as the day of 12 hours of daylight and 12 hours of darkness. In reality, the Sun’s visible disc, atmospheric refraction and latitude make the balance only approximate.
Learn how lunar impact craters form, what ejecta and regolith are, how NASA found the fresh McGetchin crater, and why its surrounding cold spot matters.
Julian De Freitas. Photo by Grace DuVal Chatbot attachment issues When AI companions get a personality update, some users respond with grief, study finds...
Host Moira Weigel (from left) with panelists Jackson Kernion of Anthropic and Ken Archer of Microsoft.Niles Singer/Harvard Staff Photographer Is there a philo...