You're listening to Bulletproof Radio with Dave Asprey.

Today's cool fact of the day is that three spider species experience the equivalent of

five-hour jet lag every day.

And if you think it takes you a few hours to recover from lost sleep or flying across

the country, just be glad you're not an orb weaver.

Three different species of orb weavers may have the shortest natural circadian rhythm

discovered in any animal so far, at least according to researchers at East Tennessee State

University.

Most animals have natural body clocks that run closer to the 24-hour day-night cycle, plus

reminds a couple hours, and light helps reset your body's timing each day.

But these spiders average about 17.4, 18.5, and 19 hours respectively.

Well, they also look like aliens, so maybe they're not really from here.

What that means is they have to shift their cycle of activity and inactivity.

They're equivalent as spiders of sleep and wake cycles by about five hours each day

just to keep up with the sun.

And that's like flying across more than five time zones and getting that much lag every

day in order to synchronize according to the researchers.

And theoretically, researchers say those spiders should not exist.

As far as the researchers know, the short cycle doesn't seem to be a problem for those

spiders.

In fact, it might even be useful.

Since they become more active at dusk and begin spending their webs three to five hours

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