Searching for smart, safe news you can TRUST?

Support safe, smart, REAL journalism. Sign up for our Axios AM & PM newsletters and get smarter, faster.

Please enter a valid email.

Please enter a valid email.

Subscription failed
Thank you for subscribing!

Searching for smart, safe news you can TRUST?

Support safe, smart, REAL journalism. Sign up for our Axios AM & PM newsletters and get smarter, faster.

Please enter a valid email.

Please enter a valid email.

Subscription failed
Thank you for subscribing!

Denver news in your inbox

Catch up on 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!

Des Moines news in your inbox

Catch up on 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!

Minneapolis-St. Paul news in your inbox

Catch up on the most important stories affecting your hometown with Axios Minneapolis-St. Paul

Please enter a valid email.

Please enter a valid email.

Subscription failed
Thank you for subscribing!

Tampa-St. Petersburg news in your inbox

Catch up on the most important stories affecting your hometown with Axios Tampa-St. Petersburg

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!

A species of spiny orb-weaver spider has a 19-hour circadian clock. Photo: ojogabonitoo / iStock

Three species of orb-weaving spiders may have the fastest biological clocks known in nature. Their circadian cycles range between 17.4 and 19.0 hours on average, instead of synchronizing with a 24-hour solar light cycle. The research, conducted at East Tennessee State University, was presented Sunday at the annual meeting of the Society for Neuroscience.

Why it matters: Their clock is so fast, it's unclear how the spiders survive. Studying extreme sleep-wake cycles and circadian clocks can help scientists understand the role these neurological timekeepers play in species survival and what causes our own rhythms to go awry due to disease.

Most research on fast circadian clocks has been done in deliberately-created mutant hamsters and fruit flies.

How they did it: Animals tend to maintain their natural circadian rhythm in the absence of light so the researchers exposed the spiders to constant dark. The spiders alternated between moving and resting in 17-19 hour loops, depending on the species.

Go deeper:

The three species are

Allocyclosea bifurca

and

Cyclosa turbinata

, both types of trashline orb-weavers, and the spiny orb-weaver (

Gasteracanthea cancriformis).

Researchers note that the spiders are most active late at night, in contrast with most nocturnal spiders, which are active early at night. It's unclear if this is related to their abnormally short circadian rhythm.

Go deeper

Updated 6 hours ago - Politics & Policy

Coronavirus dashboard

Illustration: Sarah Grillo/Axios

  1. Health: The good and bad news about antibody therapies — Fauci: Hotspots have materialized across "the entire country."
  2. World: Belgium imposes lockdown, citing "health emergency" due to influx of cases.
  3. Economy: Conference Board predicts economy won’t fully recover until late 2021.
  4. Education: Surge threatens to shut classrooms down again.
  5. Technology: The pandemic isn't slowing tech.
  6. Travel: CDC replaces COVID-19 cruise ban with less restrictive "conditional sailing order."
  7. Sports: High school football's pandemic struggles.
  8. 🎧Podcast: The vaccine race turns toward nationalism.
Dan Primack, author of Pro Rata
Updated 7 hours ago - Economy & Business

Dunkin' Brands agrees to $11B Inspire Brands sale

Photo: Alexi Rosenfeld/Getty Images

Dunkin' Brands, operator of both Dunkin' Donuts and Baskin-Robbins, agreed on Friday to be taken private for nearly $11.3 billion, including debt, by Inspire Brands, a restaurant platform sponsored by private equity firm Roark Capital.

Why it matters: Buying Dunkin’ will more than double Inspire’s footprint, making it one of the biggest restaurant deals in the past 10 years. This could ultimately set up an IPO for Inspire, which already owns Arby's, Jimmy John's and Buffalo Wild Wings.

Ina Fried, author of Login
9 hours ago - Technology

Federal judge halts Trump administration limit on TikTok

Illustration: Aïda Amer/Axios

A federal judge on Friday issued an injunction preventing the Trump administration from imposing limits on the distribution of TikTok, Bloomberg reports. The injunction request came as part of a suit brought by creators who make a living on the video service.

Why it matters: The administration has been seeking to force a sale of, or block, the Chinese-owned service. It also moved to ban the service from operating in the U.S. as of Nov. 12, a move which was put on hold by Friday's injunction.