Science

For most people, COVID-19 vaccines promise a return to something akin to normal life. But for the hundreds of thousands of Americans who have a transplanted organ, it's a different story.

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 May 8.

The total, estimated by researchers at the University of Washington, is 57% higher than the official death toll. Worldwide, they said, COVID-19 deaths are nearing 7 million, twice the official total.

The bottle of Pétrus 2000, a luxury wine that would normally cost about $6,500, spent 14 months on the International Space Station. Now, via Christie's, it can be yours.

The EPA plans to phase out hydrofluorocarbons, or HFCs, which are used in refrigerators and air conditioners. When HFCs are released into the atmosphere, they are extremely good at trapping heat.

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.

NASA announced Friday that it would be increasing operational testing on its Ingenuity helicopter following four successful test flights off the surface of Mars.