Do Big Cats Love Catnip, Too?

iStock
iStock

You bet they do!

In the 1970s, zoologists from the University of Tennessee and the Knoxville Zoological Park gave catnip and smooth rocks sprayed with catnip extract to 33 of the park's big cats to see what they’d do. The responses were mostly positive.

The park’s lions and jaguars reacted most strongly to the catnip, even at very low doses. Both the males and females of these species responded the same way, but reproductive-age animals were more sensitive than either cubs, immature adults, or very old animals. 

Tigers, cougars, and bobcats, meanwhile, reacted less strongly, and the park's two cheetahs never even approached the catnip or control objects. The researchers noted that the animals that responded to the catnip aren’t ones that would normally encounter it in the wild, since the catnip plant is native to North America and Europe. Except for the cheetahs, the cats that didn’t respond as much would encounter catnip in their natural habitat, and the researchers thought that the difference in the species’ reactions might be because of the plant's novelty, or lack thereof. 

The animals that did respond to the catnip reacted in much the same way that domestic cats do—sniffing and licking the catnip or sprayed rocks, rubbing their chins and cheeks on it or rolling over and rubbing their body on it. The big difference the researchers found in responses was that, while domestic cats will usually respond to catnip for up to 15 minutes and then take an hour or so of “reset time” before responding again, the big cats’ response can last an hour or more and they show the same response if they lose interest and then return to the catnip just a few minutes later. 

Check out some of these big cats playing with catnip below.

Why Are Sloths So Slow?

Sloths have little problem holding still for nature photographers.
Sloths have little problem holding still for nature photographers.
Geoview/iStock via Getty Images

When it comes to physical activity, few animals have as maligned a reputation as the sloth. The six sloth species, which call Brazil and Panama home, move with no urgency, having seemingly adapted to an existence that allows for a life lived in slow motion. But what makes sloths so sedate? And what horrible, poop-related price must they pay in order to maintain life in the slow lane?

According to HowStuffWorks, the sloth’s limited movements are primarily the result of their diet. Residing mainly in the canopy vines of Central and South American forests, sloths dine out on leaves, fruits, and buds. With virtually no fat or protein, sloths conserve energy by taking a leisurely approach to life. On average, a sloth will climb or travel roughly 125 feet per day. On land, it takes them roughly one minute to move just one foot.

A sloth’s digestive system matches their locomotion. After munching leaves using their lips—they have no incisors—it can take up to a month for their meals to be fully digested. And a sloth's metabolic rate is 40 to 45 percent slower than most mammals' to help compensate for their low caloric intake. With so little fuel to burn, a sloth makes the most of it.

Deliberate movement shouldn’t be confused for weakness, however. Sloths can hang from branches for hours, showing off some impressive stamina. And because they spend most of their time high up in trees, they have no need for rapid movement to evade predators.

There is, however, one major downside to the sloth's leisurely lifestyle. Owing to their meager diet, they typically only have to poop once per week. Like going in a public bathroom, this can be a stressful event, as it means going to the ground and risking detection by predators—which puts their lives on the line. Worse, that slow bowel motility means they’re trying to push out nearly one-third of their body weight in feces at a time. It's something to consider the next time you feel envious of their chill lifestyle.

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Are Any of the Scientific Instruments Left on the Moon By the Apollo Astronauts Still Functional?

Apollo 11 astronaut Neil Armstrong left the first footprint on the Moon on July 20, 1969.
Apollo 11 astronaut Neil Armstrong left the first footprint on the Moon on July 20, 1969.
Heritage Space/Heritage Images/Getty Images

C Stuart Hardwick:

The retroreflectors left as part of the Apollo Lunar Ranging Experiment are still fully functional, though their reflective efficiency has diminished over the years.

This deterioration is actually now delivering valuable data. The deterioration has multiple causes including micrometeorite impacts and dust deposition on the reflector surface, and chemical degradation of the mirror surface on the underside—among other things.

As technology has advanced, ground station sensitivity has been repeatedly upgraded faster than the reflectors have deteriorated. As a result, measurements have gotten better, not worse, and measurements of the degradation itself have, among other things, lent support to the idea that static electric charge gives the moon an ephemeral periodic near-surface pseudo-atmosphere of electrically levitating dust.

No other Apollo experiments on the moon remain functional. All the missions except the first included experiment packages powered by radiothermoelectric generators (RTGs), which operated until they were ordered to shut down on September 30, 1977. This was done to save money, but also because by then the RTGs could no longer power the transmitters or any instruments, and the control room used to maintain contact was needed for other purposes.

Because of fears that some problem might force Apollo 11 to abort back to orbit soon after landing, Apollo 11 deployed a simplified experiment package including a solar-powered seismometer which failed after 21 days.

This post originally appeared on Quora. Click here to view.

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