Circle's Eclipse launch brings AI, a discovery marketplace and a studio arm to help creators build community-led businesses.

NPR's Leila Fadel speaks with Todd Belt of George Washington University about whether there's a strategy behind President Trump's fixation on a UFC fight and building projects across Washington, D.C.

Abstract: Two-dimensional numerical simulations incorporating the spatial distributions of the energy band and temperature were used to study AlGaAs/GaAs heterojunction bipolar transistor ...