资讯

Quanta Magazine2 天

A Single, ‘Naked’ Black Hole Rewrites the History of the Universe

The James Webb Space Telescope has found a lonely black hole in the early universe that’s as heavy as 50 million suns. A ...
Sioux City Journal6 天

The gender gap in math widened in the pandemic. Schools try to make up lost ground

In 2023-2024, boys on average outscored girls in math in nearly nine out of 10 districts, an analysis of test scores shows.