How to Watch NASA Launch Its New Perseverance Mars Rover

How to Watch NASA Launch Its New Perseverance Mars Rover

The skycrane is outfitted with eight small engines that start firing when the rover is about half a mile up to rapidly slow its fall to just a few miles per hour.“These particular engines are actually a derivative of the original engines developed for Viking landers in the early ’70s, but we've made very significant upgrades,” says Fred Wilson, a propulsion expert at Aerojet Rocketdyne, the company that made the propulsion system for the Perseverance landing system.

Drones Take Flight to Carry Covid-19 Tests to Labs in Africa

Drones Take Flight to Carry Covid-19 Tests to Labs in Africa

These small drones, operated by US startup Zipline, are transporting coronavirus test samples from more than 1,000 health facilities to laboratories in the cities of Accra and Kumasi.

SpaceX and Boeing Still Need a Parachute That Always Works

SpaceX and Boeing Still Need a Parachute That Always Works

The spacecraft was Boeing’s Starliner crew capsule, which will begin carrying NASA astronauts to the International Space Station next year.Later this week, SpaceX will also perform a test of its Crew Dragon capsule, a second try after a catastrophic explosion ended a similar trial run earlier this year.