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!

Mars seen in 2018. Photo: NASA/ESA/STScI

Hard-working microbes engineered to produce strong spider silk could one day aid astronauts living on Mars.

Why it matters: NASA is looking for ways to reduce the amount of material needed to launch to space for long-duration missions. Engineering microbes to make spider silk could aid in that effort.

Spider silk — which can be as strong as steel, but incredibly light — could be useful on Mars, where space explorers might use it in place of heavy materials that would be expensive and unwieldy to transport from Earth. They could use it to build strong fabrics and possibly even surgical sutures, for example.

  • A lab led by Fuzhong Zhang at Washington University in St. Louis has produced a spider silk made by microbes that is as tough and strong as natural spider silk.
  • They're working to scale up production of the spider silk to "be able to produce meters worth, kilometers-long fibers continuously and relatively easily within the lab," Zhang told Axios.

Yes, but: Creating enough spider silk isn't the only challenge ahead for this work. The spider silk production process needs to be contained inside its own fermentor to reduce the risk of contamination, according to Zhang, which could be a technical challenge on Mars.

  • NASA will also need to protect these microbes from radiation during the journey to Mars.
  • Another NASA lab is also working to create an easily produced food source for the microbes to fuel their work on the Red Planet.

Go deeper

It's harder to fill the Cabinet

Data: Chamberlain, 2020, "United States of America Cabinet Appointments Dataset" Chart: Will Chase/Axios

It's harder now for presidents to win Senate confirmation for their Cabinet picks, an Axios data analysis of votes for and against nominees found.

Why it matters: It's not just Neera Tanden. The trend is a product of growing polarization, rougher political discourse and slimming Senate majorities, experts say. It means some of the nation's most vital federal agencies go without a leader and the legislative authority that comes with one.

Exclusive: Hundreds of kids held in Border Patrol stations

Migrants cross the Rio Bravo to get to El Paso, Texas. Photo: Herika Martinez/AFP via Getty Images

More than 700 children who crossed from Mexico into the United States without their parents were in Border Patrol custody as of Sunday, according to an internal Customs and Border Protection document obtained by Axios.

Why it matters: The current backup is yet another sign of a brewing crisis for President Biden — and a worsening dilemma for these vulnerable children. Biden is finding it's easier to talk about preventing warehousing kids at the southern border than solving the problem.

Pompeo plots 2024 power play

Mike Pompeo in Washington on Feb. 12. Photo: Samuel Corum/Getty Images

Mike Pompeo has quickly reentered the political fray, raising money for Republicans, addressing key political gatherings and joining an advocacy group run by Donald Trump's former lawyer.

Why it matters: The former secretary of state is widely considered a potential 2024 presidential contender. His professional moves this week indicate he's working to keep his name in the headlines and bolster a political brand built largely on foreign policies easily contrasted with the Biden White House.