Meta is calling on TikTok and YouTube to also set limits on teen use at night. Manuel Arias Duran/Moment RF/Getty Images hide caption toggle caption Manuel Arias Duran/Moment RF/Getty Images Stay up to date with our Up First newsletter, sent every weekday morning. The social media company Meta has agreed to pay up to $17.1
tRNA in vitro production Oligonucleotides containing tRNA under a T7 promoter and followed by an HDV ribozyme61 were synthesized by IDT as high-fidelity DNA microchip oligo pools from 254–275 nucleotides in length, and dsDNA was amplified in a single PCR reaction for each pool. These tRNA pools included 48 unique E. coli isoacceptor tRNAs with
Netia McCray stands outside the Museum of Science, where she runs a STEM educational program for teens, in Boston, Mass. McCray has been suffering from long COVID since 2020. Lucy Lu for NPR hide caption toggle caption Lucy Lu for NPR Netia McCray recalls how excited she was to join the federal advisory committee on
D-shaped magnets form part of a tokamak that is being built for a nuclear-fusion pilot project. Credit: Commonwealth Fusion Systems About a dozen technicians, in hard hats and protective clothing, move around a large, double-height room. Some are checking pipes coming up through the floor into a raised, circular platform. Others work on instruments installed
Most spacecraft use solar panels to power their equipment — but missions to places such as the shadowed craters of the Moon or the deep Solar System can’t rely on energy from the Sun. Could nuclear fuel, with its high energy density, be a promising alternative? In this film, Nature explores the work of a
Inside a nondescript warehouse in an industrial park in Oakville, Canada, sits a squat forklift truck that requires no driver. When activated by its remote operator, the vehicle trundles to a stack of huge clay blocks, each weighing 8,000 kilograms, and carries them into a narrow rock tunnel. Another custom-built machine then fills the spaces