Sign up for our daily briefing

Make your busy days simpler with Axios AM/PM. Catch up on what's new and why it matters in just 5 minutes.

Please enter a valid email.

Please enter a valid email.

Subscription failed
Thank you for subscribing!

Stay on top of the latest market trends

Subscribe to Axios Markets for the latest market trends and economic insights. Sign up for free.

Please enter a valid email.

Please enter a valid email.

Subscription failed
Thank you for subscribing!

Sports news worthy of your time

Binge on the stats and stories that drive the sports world with Axios Sports. Sign up for free.

Please enter a valid email.

Please enter a valid email.

Subscription failed
Thank you for subscribing!

Tech news worthy of your time

Get our smart take on technology from the Valley and D.C. with Axios Login. Sign up for free.

Please enter a valid email.

Please enter a valid email.

Subscription failed
Thank you for subscribing!

Get the inside stories

Get an insider's guide to the new White House with Axios Sneak Peek. Sign up for free.

Please enter a valid email.

Please enter a valid email.

Subscription failed
Thank you for subscribing!

Catch up on coronavirus stories and special reports, curated by Mike Allen everyday

Catch up on coronavirus stories and special reports, curated by Mike Allen everyday

Please enter a valid email.

Please enter a valid email.

Subscription failed
Thank you for subscribing!

Want a daily digest of the top Denver news?

Get a daily digest of the most important stories affecting your hometown with Axios Denver

Please enter a valid email.

Please enter a valid email.

Subscription failed
Thank you for subscribing!

Want a daily digest of the top Des Moines news?

Get a daily digest of the most important stories affecting your hometown with Axios Des Moines

Please enter a valid email.

Please enter a valid email.

Subscription failed
Thank you for subscribing!

Want a daily digest of the top Twin Cities news?

Get a daily digest of the most important stories affecting your hometown with Axios Twin Cities

Please enter a valid email.

Please enter a valid email.

Subscription failed
Thank you for subscribing!

Want a daily digest of the top Tampa Bay news?

Get a daily digest of the most important stories affecting your hometown with Axios Tampa Bay

Please enter a valid email.

Please enter a valid email.

Subscription failed
Thank you for subscribing!

Want a daily digest of the top Charlotte news?

Get a daily digest of the most important stories affecting your hometown with Axios Charlotte

Please enter a valid email.

Please enter a valid email.

Subscription failed
Thank you for subscribing!

Please enter a valid email.

Please enter a valid email.

Subscription failed
Thank you for subscribing!

Perseverance's landing site. Photo: NASA/JPL-Caltech/ASU

NASA's Perseverance rover — designed to further the hunt for past life on Mars — successfully touched down on the Red Planet Thursday.

Why it matters: Mars was once a relatively warm, wet and habitable world, and Perseverance — nicknamed Percy — could help NASA figure out if it was inhabited billions of years ago.

What's happening: Perseverance landed in Jezero Crater at the site of what scientists think was once a river delta, thought to be one of the best places to hunt for past life.

  • The rover will now go through a series of checkouts before it begins roaming the planet and searching for interesting rocks to study.
  • Perseverance comes equipped with multiple instruments, including one designed to create oxygen from carbon dioxide in the atmosphere, which might one day be used by human explorers.

The big picture: Perseverance completes the trio of missions from three different nations that launched to Mars in July and successfully arrived this month.

  • The United Arab Emirates' Hope probe and China's Tianwen-1 mission are both orbiting the planet now. China's spacecraft is expected to release a rover down to the surface in the coming months.

What's next: Perseverance is equipped with sample tubes that it will fill with the most interesting looking rocks for an eventual return to Earth on a future mission, expected to launch in 2026.

Go deeper

Miriam Kramer, author of Space
Feb 16, 2021 - Science

Breaking down the role nuclear power could play in getting people to Mars

Artist's illustration of a nuclear propulsion system and habitat around Mars. Image: NASA

Nuclear power is a good bet to get people to and from Mars, according to a new report. However, there's still a long way to go before it's viable.

Why it matters: NASA has plans to send astronauts to Mars in the 2030s, but the technology needed for such an extreme mission is still in development.

Biden explains justification for Syria strike in letter to Congress

Photo: Chris Kleponis/CNP/Bloomberg via Getty Images

President Biden told congressional leadership in a letter Saturday that this week's airstrike against facilities in Syria linked to Iranian-backed militia groups was consistent with the U.S. right to self-defense.

Why it matters: Some Democrats, including Sens. Tim Kaine (D-Va.) and Chris Murphy (D-Conn.) and Rep. Ro Khanna (D-Calif.), have criticized the Biden administration for the strike and demanded a briefing.

6 hours ago - Health

FDA authorizes Johnson & Johnson's one-shot COVID-19 vaccine for emergency use

Photo: Illustration by Pavlo Gonchar/SOPA Images/LightRocket via Getty Images

The Food and Drug Administration on Saturday issued an emergency use authorization for Johnson & Johnson's one-shot coronavirus vaccine.

Why it matters: The authorization of a third coronavirus vaccine in the U.S. will help speed up the vaccine rollout across the country, especially since the J&J shot only requires one dose as opposed to Moderna and Pfizer-BioNTech's two-shot vaccines.