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!

Catch up on the day's biggest business stories

Subscribe to Axios Closer for insights into the day’s business news and trends and why they matter

Please enter a valid email.

Please enter a valid email.

Subscription failed
Thank you for subscribing!

Sign up for Axios Pro Rata

Dive into the world of dealmakers across VC, PE and M&A with Axios Pro Rata. Delivered daily to your inbox by Dan Primack and Kia Kokalitcheva.

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!

Want a daily digest of the top Nashville news?

Get a daily digest of the most important stories affecting your hometown with the Axios Nashville newsletter.

Please enter a valid email.

Please enter a valid email.

Subscription failed
Thank you for subscribing!

Want a daily digest of the top Columbus news?

Get a daily digest of the most important stories affecting your hometown with the Axios Columbus newsletter.

Please enter a valid email.

Please enter a valid email.

Subscription failed
Thank you for subscribing!

Want a daily digest of the top Dallas news?

Get a daily digest of the most important stories affecting your hometown with the Axios Dallas newsletter.

Please enter a valid email.

Please enter a valid email.

Subscription failed
Thank you for subscribing!

Want a daily digest of the top Austin news?

Get a daily digest of the most important stories affecting your hometown with the Axios Austin newsletter.

Please enter a valid email.

Please enter a valid email.

Subscription failed
Thank you for subscribing!

Want a daily digest of the top Atlanta news?

Get a daily digest of the most important stories affecting your hometown with the Axios Atlanta newsletter.

Please enter a valid email.

Please enter a valid email.

Subscription failed
Thank you for subscribing!

Want a daily digest of the top Philadelphia news?

Get a daily digest of the most important stories affecting your hometown with the Axios Philadelphia newsletter.

Please enter a valid email.

Please enter a valid email.

Subscription failed
Thank you for subscribing!

Want a daily digest of the top Chicago news?

Get a daily digest of the most important stories affecting your hometown with the Axios Chicago newsletter.

Please enter a valid email.

Please enter a valid email.

Subscription failed
Thank you for subscribing!

Sign up for Axios NW Arkansas

Stay up-to-date on the most important and interesting stories affecting NW Arkansas, authored by local reporters

Please enter a valid email.

Please enter a valid email.

Subscription failed
Thank you for subscribing!

Want a daily digest of the top DC news?

Get a daily digest of the most important stories affecting your hometown with the Axios DC newsletter.

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!

From our Expert Voices conversation on travel to Mars.

To make a Mars mission a reality, we will lean on four main capabilities:

  1. Controlled hypersonic flight of slender-body vehicles. SpaceX has successfully brought back the first stage of their Falcon 9 rockets, testing on both a droneship at sea and a landing pad near their launch site.
  2. Supersonic retro-propulsion. For large objects, parachutes and other familiar landing systems won't work on the Martian surface. We'll need a new landing propulsion in which a rocket engine descending at supersonic speeds is ignited in order to slow down for landing.
  3. Full and rapid reusability of rockets and spacecraft. Aircraft-like operations will be essential in keeping down costs.
  4. Refueling in orbit and on planetary surfaces. We'll need to "live off the land" as much as possible. That means, for example, turning Mars' atmosphere into rocket fuel and launching fuel tankers into space to refuel a primary ship.

SpaceX has already demonstrated the first and second of these capabilities and efforts on the third are progressing. The refueling challenges are trickiest—they will require complicated on-orbit and on-surface operations that involve engineering and procedures yet to be developed.

What's next: While the timeline and capabilities are certainly ambitious, the U.S. aerospace industry has demonstrated it is ready to lead us into this exciting future.

Other voices in the conversation:

Go deeper

Tina Reed, author of Vitals
43 mins ago - Health

Experts fear a bad flu season on top of COVID

Illustration: Sarah Grillo/Axios

Public health officials are warning that the U.S. may be on the verge of a dangerous double whammy: COVID and flu, spreading simultaneously.

The big picture: The Delta variant is still circulating across the U.S., and the Omicron variant isn't far behind. On top of that, experts see potential warning signs of a bad flu season, which could leave millions of Americans vulnerable and strain health care resources.

Updated 2 hours ago - World

Australia joins U.S. in diplomatic boycott of Beijing Winter Olympics

Australian Prime Minister Scott Morrison. Photo: Darrian Traynor/Getty Images

Australia is joining the U.S. in a diplomatic boycott of the 2022 Beijing Winter Olympic Games in protest of human rights abuses committed by China's government, Prime Minister Scott Morrison confirmed Wednesday.

Driving the news: After the Biden administration's announcement that U.S. officials won't attend the Games due to the ongoing genocide of Uighurs and other Muslim minorities in the Xinjiang region of China, Morrison said at a Sydney briefing that Australia would follow suit as "it's the right thing to do."

Progressives to file resolution to strip Boebert's committee seats

Rep. Lauren Boebert walking through the Senate side of the U.S. Capitol earlier this month. Photo: Drew Angerer/Getty Images

House progressives are planning to introduce a resolution on Wednesday to strip Rep. Lauren Boebert (R-Colo.) of her committee assignments, according to a Democratic aide familiar with the matter.

Why it matters: The move, which was first reported by the Washington Post, comes as progressives — anxious to see the right-wing firebrand face retribution for her recent comments — have grown frustrated by Democratic leadership's inaction on the issue.