Plus: Octopus brainwaves, mysteries of ancient architects, and the mental health of farmers.
 
 

ON THE MENU

Good morning!

 

The French winery Domaine du Météore has a legit name after all. A geologist on vacation found telltale evidence of a meteorite impact (spherules, magnetism, microdiamonds), making it just the 4th known small impact crater in the world. Read on about glassy-winged sharpshooters, octopus brain waves, and farming mental health.

 
Fast Fact
 

QUICK BITE

The star-nosed mole (Condylura cristata) has a nose ringed by 22 fleshy tentacles with 30,000 sense organs. A new study shows that its nose “star” is not kept warm like other body parts. Study authors Glenn Tattersall and Kevin Campbell say that “having a high amount of warm blood flowing to the nasal rays would be a huge heat sink and cost them a lot of wasted energy,” as the moles poke into cold water and soil. See how they hunt HERE.

 
Grab Bag
 

GRAB BAG

INSECT BEHAVIOR

Number one, with a bullet

Tiny sharpshooter insects use anus to catapult urine drops at high speed 

Although pee-flinging sounds like a fraternity stunt, the glassy-winged sharpshooter is no frat boy. This half-inch-long leafhopper (Homalodisca vitripennis) spends its days piercing plants and downing their liquids, not slugging beers. And a recent study shows how it gets rid of its fluid waste efficiently.

 

Researchers imaged and modeled the urination of five glass-winged sharpshooters. They found that urine exits the anus to form a growing droplet, which is then flicked by a spring-loaded anal structure (the stylus) at super propulsive speeds. Say study authors, “superpropulsion provides a gateway to propel an elastic projectile faster than the maximum speed of its actuator.”

 

Why catapult urine drops, other than to impress your peers? The study authors demonstrate mathematically that it requires as little as an eighth of the energy needed to power a urine stream. They also propose that it might also reduce pee smells that could attract predators, pointing out  that other insects are ‘frass-shooters,’ ‘butt-flickers,’ and ‘turd-hurlers.’

 

ANCIENT HUMANS

Put your heads together

Researchers emulate how Chaco Canyon peoples built great houses without livestock

The Navajo (Diné) and Pueblo Peoples that lived in Chaco Canyon a thousand years ago built staggering structures — like dwellings that required transporting an estimated 200,000 logs for fifty miles (likely to make anyone stagger). Considering they had no draft animals or mechanized transport, the feat had left archaeologists scratching their heads. 

 

Now, a new study announces a way that the engineering feat might have been accomplished — with tumplines. Tumpwhat? A tumpline is a head sling depicted in some Mexican ceramics. Used by a pair of people, the tumplines cradle a log horizontally across their backs. 

 

Two researchers found that, after several months of daily training, they could carry a log 15 miles in less than ten hours. Explains study author Weiner, “As they became more comfortable with their training, we began alternating training days between carrying light loads for greater distances and heavier loads for shorter distances."

 

So, now triple the distance, multiple the number of logs by 200,000, and hoist it on the backs of people with smaller stature. Tumplines or not, it’s still a feat. 

 

OCTOPUS BRAINS

Making waves

Implanted electrodes reveal the unique brainwaves of free-swimming octopuses

How do you monitor the brain activity of animal that has no skeleton, eight autonomous arms each with its own mini-brain, and enough intellect to pluck electrodes off its body? Scientists have asked that question in studying the remarkable intelligence of octopuses.

 

In a recent study, the question was answered by surgically inserting a data logger inside an octopus and positioning the electrodes directly on its brain cells. The researchers monitored the brain activity of three free-swimming day octopuses (Octopus cyanea) for twelve hours. 

 

They found brain activity patterns like those of mammals, plus some unique long, slow oscillations. You’d expect unusual activity in an animal with “a large brain, an amazingly unique body, and advanced cognitive abilities that have developed completely differently from those of vertebrates,” as described by study author Tamar Gutnick.”


The next step is to keep an eye on the brainwaves while challenging octopuses to show some of their remarkable skills, such as in this Escape Room Challenge.

 
In The News
 

IN THE NEWS

  • Surprising research reveals rampant violence in early farming societies.

  • There’s a new grassroots effort to support farmers’ mental health.

  • And a new study finds female farmers in Indonesia are low-key influential.

 
The Full Scope
 

THE FULL SCOPE

Farms are often glorified as pastoral, restful places. But many a farmer might beg to differ. Keeping a farm operating is mucky, grueling, and financially challenging.

 

A Modern Farmer article urging people to stop romanticizing farms quotes goat farmer Molly Kroiz about pastoral tourism, “I think that we may run into issues with couples wanting a ‘farm’ atmosphere, but perhaps not the reality: that there are animals living here, and therefore certain smells and a certain amount of poop, etc. must be expected.” Again, mucky! 

 

And expensive. The small family farms that are fodder for pastoral fantasies have an operating profit margin in a high-risk zone, including 9-25 percent of small American farms. It’s no wonder that agricultural labor force worldwide has plummeted to the present. You can tinker with the numbers by country to see the decline HERE.

 

So, if you’re becoming a farmer, consider not just how to feed your livestock, maintain soil quality, and get products to market, but also how to maintain your mental health. An Australian initiative recognized that suicide rates of farmers were 59% higher than non-farmers. 

 

The researchers interviewed farmers about their mental distress. Says study author Lia Bryant, “We found that on top of key stress factors that affect farmers in general — things like weather extremes, physical isolation, intergenerational issues, and financial pressures, to name a few — there were additional shared risk factors that farmers in the same region (or farming the same commodity) experienced.” Aussie farmers can now tap into the Taking Stock site for mental support resources.

 

Even if we evoke the earliest days of farming, there were plenty of stresses and strains. A recent study researched the farming communities of Neolithic Europe. Archaeological evidence revealed lots of conflict, violence, and warfare. More than 1 in 10 of 2300 farmers’ bones had injuries from weapons, including axe blows to their skulls. 

 

Study author Martin Smith proposes that farming upped the violence, even laying the foundations for warfare: “With farming came inequality and those who fared less successfully appear at times to have engaged in raiding and collective violence as an alternative strategy for success.” 

 

Men have traditionally been the decision-makers in agriculture, and therefore also the ones at risk of head blows, then, and suicide, now. But, the proportion of farms run by women is on the rise. Still, a study in Sulawesi, Indonesia, found that older males are considered the opinion leaders. Yet, it was women and younger farmers who actually swayed people towards adopting a new farming tool. 

 

Says study author Petr Matous, “While women and young people don’t usually occupy formal leadership positions in their communities and are not typically central to information and resource networks that result from roles like heading a farmer group, they may have other networks that matter, such as more active kinship ties.”

 

It sounds like more community-building to support farmers is in order. 

 
NerdSnack Picks
 

NERDSNACK PICKS

  • You can boil water in a plastic bag, but this woman made a whole soup.
  • Watch an “undertaker bee” sniff out a corpse of their nestmate and carry them off.
  • Tardigrades have intricate eggs that look as bizarre as they do.

  • This elephant escaped a crocodile attack by twerking.

 

COMING UP

Next time, we’ll catch the beat of recent research on heart health.

 

MEME OF THE WEEK

Written by Devin Reese, Edited by Jake Currie

 

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