Why Are Lemurs So Weird? Maybe Because They Don't Eat Enough Fruit

Luca Santini
Luca Santini

Lemurs are weird animals. Found only in Madagascar, they're primates (like apes, gorillas, and us), but unlike all other primates, they do things like hibernate and sleep in caves—that is, when they sleep, because they don't follow the normal nocturnal/diurnal pattern. Oh, and unlike many primates, most of them aren't frugivores. Meaning, they don't eat fruit. Their diet is much heavier on leaves than other primates.

A new study in the journal Scientific Reports suggests a reason why: The fruit available on the island doesn't have enough protein in it to meet their dietary needs, so they evolved a diet that didn't include it. The researchers, an international team led by Giuseppe Donati of Oxford Brookes University, combed through 79 different studies to analyze the nitrogen content (a necessary component of protein) of fruits cross the world and compare the rates of primate communities who eat fruit in different regions.

The higher the protein content of the fruits found in an area, they discovered, the more the animals relied on them as a food source. The fruits of Madagascar are also lower in nitrogen than fruits elsewhere, and in turn, the number of lemur communities in Madagascar that eat fruit is significantly lower than the number of primates in the Western Hemisphere, Asia, or elsewhere in Africa that eat fruit. (Only two genera of lemur subsist mainly on fruit, while elsewhere in the world, even primates that eat leaves still enjoy a good fruit salad now and then.)

"Lemurs are equal parts ridiculously cool and totally bizarre in that they represent the extremes and the extremely strange in the primate world," the Field Museum's Abigail Derby Lewis, a senior conservation ecologist, said in a press release. And studying their dietary patterns suggests why they've evolved to be so strange in comparison to their other primate relatives. Unable to get protein from fruit, they had to eat more leaves. To eat more leaves, their sleep schedules had to accommodate round-the-clock eating, which would explain their odd sleep patterns. And to conserve energy, they go into hibernation.

Lemurs aren't the only primates that go for leaves over fruit. So do howler monkeys. A March 2017 study found that primates that do eat fruit tend to have bigger brains. Nutritious fruit might not be the sole factor determining how primate species evolve, but it's clear that having access to it matters significantly. 

The ChopBox Smart Cutting Board Has a Food Scale, Timer, and Knife Sharper Built Right Into It


When it comes to furnishing your kitchen with all of the appliances necessary to cook night in and night out, you’ll probably find yourself running out of counter space in a hurry. The ChopBox, which is available on Indiegogo and dubs itself “The World’s First Smart Cutting Board,” looks to fix that by cramming a bunch of kitchen necessities right into one cutting board.

In addition to giving you a knife-resistant bamboo surface to slice and dice on, the ChopBox features a built-in digital scale that weighs up to 6.6 pounds of food, a nine-hour kitchen timer, and two knife sharpeners. It also sports a groove on its surface to catch any liquid runoff that may be produced by the food and has a second pull-out cutting board that doubles as a serving tray.

There’s a 254nm UVC light featured on the board, which the company says “is guaranteed to kill 99.99% of germs and bacteria" after a minute of exposure. If you’re more of a traditionalist when it comes to cleanliness, the ChopBox is completely waterproof (but not dishwasher-safe) so you can wash and scrub to your heart’s content without worry. 

According to the company, a single one-hour charge will give you 30 days of battery life, and can be recharged through a Micro USB port.

The ChopBox reached its $10,000 crowdfunding goal just 10 minutes after launching its campaign, but you can still contribute at different tiers. Once it’s officially released, the ChopBox will retail for $200, but you can get one for $100 if you pledge now. You can purchase the ChopBox on Indiegogo here.

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How to Watch SpaceX’s Historic Astronaut Launch Live

NASA astronauts Doug Hurley and Bob Behnken make their way to the SpaceX Falcon 9 rocket with the Crew Dragon spacecraft on launch pad 39A at the Kennedy Space Center on May 30, 2020 in Cape Canaveral, Florida.
NASA astronauts Doug Hurley and Bob Behnken make their way to the SpaceX Falcon 9 rocket with the Crew Dragon spacecraft on launch pad 39A at the Kennedy Space Center on May 30, 2020 in Cape Canaveral, Florida.
Joe Raedle/Getty Images

After scrubbing its original launch on May 27 due to bad weather, SpaceX will attempt to make history yet again today (May 30) when it launches its first crewed spacecraft from Cape Canaveral, Florida, at 3:22 p.m. EDT. Powered by a Falcon 9 rocket, the Crew Dragon spacecraft will transport NASA astronauts Doug Hurley and Bob Behnken to the International Space Station, marking the company's first-ever crewed mission and the first crewed launch from the U.S. since 2011. If you want to watch the momentous event from home, there are plenty of ways to stream it live online.

Both SpaceX and NASA will be hosting livestreams of the May 30 launch. NASA's webcast kicks off at 11 a.m. EDT today with live looks at the Crew Dragon and Falcon 9 rocket at the Kennedy Space Center. The feed will continue streaming until the afternoon of Sunday, May 31, with the spacecraft set to dock at the International Space Station at 10:29 a.m. EDT. You can catch the coverage on NASA's website, its social media channels (including YouTube), or on the NASA TV channel through cable or satellite. SpaceX's stream will be broadcast on the company's YouTube channel. (You can watch the video below).

Several television networks will be covering the event (check your local listings), and ABC News Live will partner with National Geographic to air "Launch America: Mission to Space Live" at 3 p.m. EDT.

The launch has been scheduled down to the minute, but SpaceX still has time to change that depending on the weather. Wednesday's launch was canceled less than 17 minutes before liftoff, and SpaceX founder Elon Musk has already tweeted that there's a 50 percent chance that weather could prove problematic once again. If today's launch doesn't happen according to plan, there is another window set aside for a third attempt tomorrow, Sunday, May 31, at 3 p.m. EDT, with CNN reporting that the odds of cooperative weather being slightly higher—about 60 percent—for tomorrow.

This story has been updated.