Cockroach DNA Shows Why They're Basically Indestructible

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iStock

Most people are all too aware that cockroaches are horrifyingly resilient beings. Yes, they can and have survived nuclear blasts, and surely stand to inherit the Earth after we all succumb to the apocalypse. Why is this creature able to thrive in the face of pesticides, the loss of limbs, disgusting conditions, a range of climates, and even nuclear fallout, in urban kitchens across the world? As Inside Science reports, a new study on the genome of the American cockroach shows that certain genes are key to its wild evolutionary success.

In an article published in Nature Communications, researchers from South China Normal University in Guangzhou, China report that they sequenced and analyzed the genome of Periplaneta americana, and in the process they discovered just how indestructible this scourge is. They found that the cockroach (native to Africa, despite its American moniker) has more DNA than any other insect whose DNA has been sequenced except the migratory locust. The size of its genome—3.3 billion base pairs—is comparable to that of humans.

They have a huge number of gene families (several times the number other insects have) related to sensory reception, with 154 smell receptors and 522 taste receptors, including 329 taste receptors specifically related to bitter tastes. These extra smell and taste receptors may help cockroaches avoid toxic food (say, your household pesticide) and give them the ability to adapt to a multitude of different diets in different environments.

They also have killer immune systems able to withstand pathogens they might pick up from the rotting food they eat and the filth they like to live in. They have many more genes related to immunity compared to other insects.

The genome analysis might give us more than just a newfound respect for this revolting pest. The researchers hope to find a way to harness this new knowledge of cockroach immunity to control vermin populations—and create an eradication method slightly more effective than just stomping on them.

[h/t Inside Science]

Save Up to 93 Percent on 8 Gaming Accessories and Enter to Win a Free Nintendo Switch Bundle

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Stackcommerce

The Nintendo Switch is one of the hottest video game consoles of the past few decades, with worldwide sales topping 55 million (that's more than the Super Nintendo and Nintendo 64, and it's only a few million behind the original NES). The problem with a console being so popular is that it's not always easy to spot one on store shelves. If you haven't had luck finding one in recent months, you can enter this contest to win your very own Nintendo Switch, along with a copy of Animal Crossing: New Horizons, a pair of Switch-compatible Logitech wireless headphones, and a $300 Nintendo gift card. Head here for more details.

While you wait to see who wins, check out these other great deals on gaming accessories.

1. Protective TPU Case for Nintendo Switch Console; $12 (20 percent off)

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Once you get your Switch, you'll want to keep it in pristine condition. This protective case is made with shock-absorbent, flexible TPU for full protection against bumps, scratches, dust, fingerprints, and even the occasional toss in the heat of the moment.

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The standard Switch will only charge one pair of Joy-Cons at a time, so if you've got a roommate always willing to hop in on a quick game of Mario Kart, you'll need this spare charging dock to make sure their controller is ready to go. The weighted base keeps the controllers stable so they’ll sit still to charge until you’re ready to play.

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Same as above, except this model charges two pairs of Joy-Cons at once. The easy-to-read red LED light lets you know it’s working, and the green lets you know it’s time to play.

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This portable HD gaming device packs over 500 classic arcade games like Pac-Man, Contra, Tetris, and plenty more. And with five hours of battery life, you'll get plenty of nostalgia before needing a recharge.

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The precision (or lack thereof) of a mouse can make all the difference when gaming on a PC. This wireless model comes with a 1600DPI true gaming sensor, ultra-precise scroll wheel, and high-precision positioning to avoid any lag while in a game.

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A Nintendo Gamecube controller is still the best way to play any of the Super Smash Bros. titles, and with this adapter, you can use the old-school controllers on the Wii U or Nintendo Switch for an easy way to dive into multiplayer games. It also works for PC gaming.

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If you haven’t already, you’re going to want to back up all of your files to an external hard drive. This external HDD has 3TB of storage, meaning you likely won't run out of space even if you tried.

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This bag was designed specifically to hold gaming laptops and consoles, plus their accessories, in three large storage sections and four side pockets. It also features an external USB charge port for instant power.

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Prices subject to change.

This article contains affiliate links to products selected by our editors. Mental Floss may receive a commission for purchases made through these links. If you haven't received your voucher or have a question about your order, contact the Mental Floss shop here.



100 Fascinating Facts About Earth

The best Spaceball.
The best Spaceball.
NASA

Did you know that there’s a place in the South Pacific Ocean called Point Nemo that’s farther from land than any other point on Earth? So far, in fact, that the closest humans are usually astronauts aboard the International Space Station. (And by the way: The map you’re about to look for Point Nemo on might not be entirely accurate; a certain amount of distortion occurs when trying to depict a 3D planet on a 2D surface.)

In this all-new episode of The List Show, Mental Floss editor-in-chief Erin McCarthy is journeying to the center of the Earth, and visiting its oceans, its atmosphere, and even space, in search of 100 facts about our endlessly fascinating planet.

The subjects that fall under the umbrella of “facts about Earth” are nearly as expansive as Earth itself. Geology, biology, astronomy, and cartography, are all fair game—and those are just a few of the many -ologies, -onomies, and -ographies you’ll learn about below. 

Press play to find out more Earth-shattering facts, and subscribe to the Mental Floss YouTube channel for more fact-filled videos here.