Science

Scientists have accidentally discovered a particle that has mass when traveling in one direction, but no mass while moving in a different direction. Known as semi-Dirac fermions, particles with this bizarre behavior were first predicted 16 years ago.

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When the Swiss and Italian governments got together to redraw the alpine border that divides the two countries last year, due to rapidly retreating glaciers, it put into stark focus a challenge that is expected to face many nations that have natural structures that mark territories.

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Filter-feeding mollusks respond to water pollution in a very detectable and measurable manner. With that fact in mind, scientists have created a water-quality-monitoring system that uses electronically augmented live mollusks as its sensors.

The Artemis II and III missions slated to return US astronauts to the Moon have been set back. At a press conference, NASA officials said that problems with the heat shield and life support systems would delay the launches until 2026 and 2027.

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