Canadian astronaut Jeremy Hansen announced Monday that he is stepping down from his full-time role as an astronaut, months after flying around the moon on NASA’s Artemis II mission.

An exclusive look at Greensea IQ's AI-powered robots that can find and clear mines on the ocean floor. A powerful new tool that minimizes the human risk of deactivating these deadly hazards. NBC News' Brian Cheung reports.

Temperatures on the ocean surface hit a record high in June, European scientists warned Wednesday, fueling fears of more dangerous heat waves this summer.

The announcement is the latest in a stream of funding contracts NASA has awarded private companies in its effort to establish a permanent presence on the moon.

NBC News’ Gadi Schwartz previews the new exhibit at the California Science Center, where visitors will soon be able to view NASA’s space shuttle Endeavour in its ready-to-launch position.

NASA on Tuesday plans to launch a mission to save its Neil Gehrels Swift Observatory. A spacecraft is expected to push the telescope into a stable orbit so it doesn’t fall into the atmosphere.

The NASA Swift space observatory is in danger of falling from space after 22 years, but a rescue mission with the help of a robot is set to launch on June 30. NBC News’ Gadi Schwartz talks with Katalyst Space CEO Ghonhee Lee, the company partnering with NASA, about the historic mission.

Venezuela’s pair of earthquakes is considered doublet sequence. It’s not rare to have two quakes in short succession, but in this case, that likely led to more destruction.

A counterintuitive recipe for wildfires is brewing across drought-stricken Western states: a cold front

For the first time, federal firefighters will be encouraged to wear respirators to protect against smoke-related hazards as they put out wildfires, the U.S. Forest Service announced.

A deadly heatwave is tightening its grip on Europe, sending temperatures soaring toward record levels and forcing authorities across the continent to close schools, cancel public events and even restrict alcohol consumption

A radio telescope project known as the Deep Synoptic Array is moving forward. It aims to detect radio waves emitted by stars, planets, galaxies and other celestial objects.

Severe storms, flash flooding and extreme heat are battering parts of the Plains, Midwest and the South this weekend, threatening to disrupt World Cup fans, athletes and holiday travelers alike

GJ 504b, the pink planet, is 57 light years away from Earth and now scientists at Northwestern University discovered it has a salty set of clouds surrounding it. Astrophysicist Aneesh Baburaj, who has been leading much of the research, talks with NBC News’ Gadi Schwartz about the discovery and if the pink planet is even a planet after all.

The forecast for Tropical Storm Arthur calls for up to 20 inches of rain in some areas. After hitting the Texas coast, it’s expected to douse parts of Louisiana, Mississippi, Georgia and Florida.

An experimental vaccine aimed at preventing fentanyl overdoses showed promise in an early-stage clinical trial, according to the drugmaker, ARMR Sciences. NBC News' Berkeley Lovelace Jr. explains how this breakthrough could combat the opioid crisis.

A new study describes the oldest evidence of a plague outbreak ever found, in a set of skeletons excavated from prehistoric graves in Siberia dating back 5,500 years.

After it launches in August, NASA’s Nancy Grace Roman Space Telescope is expected to survey more of the sky than any space telescope before, at a pace hundreds of times faster.

Prepare for heat, drought and flooding — it’s officially El Niño season, according to the National Weather Service. This one could be on par with some of the strongest in past years.

After NASA announced the astronauts selected for the Artemis III mission, the lack of women sparked disappointment and outrage, Administrator Jared Isaacman said.