Joe Biden delivered an incredible keynote address at a prominent annual progressive rally on Friday, pleading with the left wing of the Democratic Party to back him in this fall’s election to defeat President Donald Trump. Speaking with Netroots Nations, the top annual meeting of progressives, Biden made clear his …

© David J. Phillip / Associated Press More than half of the states, including Texas, Pennsylvania and Ohio, do not require their own Covid-19 inspectors to be tested before entering nursing homes, despite concerns that asymptomatic visitors may pose a risk to residents. The federal government said in June that …

Arecibo Observatory, the most powerful telescope in the world, based in Puerto Rico, was damaged Monday after a cable snapped and cut a large hole in the telescope’s reflective disk. The University of Central Florida manages the facilities of the National Science Foundation, along with Universidad Ana G. Mendez and …

After a promising start to his NFL career, Dante Pettis retired last season. The 49ers receiver drew 27 receptions for 467 yards and five touchdowns in 12 games as a rookie, but produced a disappointing sophomore campaign in which he dropped the deep card and ended up in Kyle Shanahan’s …