U.S. Space Command says the exact entry point into the Earth's atmosphere cannot be pinpointed until hours before its reentry, which is expected sometime around Saturday.
If you imagine viruses as pieces of a jigsaw puzzle, that can help explain what happens when a coronavirus variant comes into contact with human cells.
In a new book, author Michael Lewis writes about public health officers who tried to get others to look at the data on COVID-19 and act to make sure the virus didn't spread.
This isn't the first big vaccine rollout, and the past holds lessons for the pandemic present. Here's a look at how the polio vaccine overcame U.S. hesitancy.
SpaceX safely returned four astronauts from the International Space Station on Sunday, making the first U.S. crew splashdown in darkness since the Apollo 8 moonshot.
NASA announced Friday that it will increase operational testing of its Ingenuity helicopter following four successful test flights off the surface of Mars.
Climate and health policies rely on scientific expertise. But the federal science workforce has been shaped by decades of political interference, underfunding and race and gender bias.
Collins was the crew member who stayed in orbit on the Apollo 11 command module while Neil Armstrong and Buzz Aldrin walked on the moon. Later he oversaw building of the National Air and Space Museum.
Biologists say newly efficient and accurate gene sequencing techniques have allowed them to fairly quickly detail full genomes and find overlooked genes in a broad range of 25 important species.