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If Earth's orbit is so crowded, why don't we see space junk in photos of the Earth?

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Sometimes, when we post a cool picture of the Earth taken from space, Popular Science gets questions about why, if there's so much garbage in space, we don't see an orbital landfill circling our planet in pictures of the Earth. No, it’s not some massive conspiracy, and yes, the space above our planet is getting increasingly and worryingly crowded with satellites and space junk. It’s just that humans and the things we build are tiny compared to the vastness of our planet. There are about 4,256 human-made satellites orbiting the Earth, of which about 1,149 are still working. Most of these are fairly small, ranging from tiny CubeSats that are only four inches on each side to communications satellites that can be over 100 feet long. READ MORE AT: https://www.popsci.com/space-junk-why-cant-we-see-satellites-in-images-earth

How To Argue With Someone Who Says 'Pandas Deserve To Die'

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A baby panda was born last week at the National Zoo. The National Zoo, and many people not associated with the Zoo, celebrated, because the panda is a very endangered animal and has become an emblem of the conservation movement, and it is very difficult to get pandas to produce surviving offspring in captivity. But because it is 2013, and because it is easier and garners more pageviews to be boldly wrong than boringly right, many internet publications and people who like to argue began a well-trodden argument: the panda deserves to die. Breeding pandas is "prolonging the existence of a hopeless and wasteful species the world should've given up on long ago," writes Timothy Lavin in Bloomberg. After the death of a panda named Hsing-Hsing, in 2009, David Plotz of Slate wrote: "Pandas are not ill-natured. They are worse: They are no-natured. Drearier animals you cannot imagine. They are highly anti-social, detesting interaction with other pandas and people....

What Happens To Your Body When You Get Drunk And Stoned At The Same Time?

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The intoxicating effects of alcohol and of marijuana have been widely studied, but their combined effect—getting "cross-faded"—is woefully underexplored scientific territory. Here's a look at what we know about how pot and booze together affect the brain. First, the basics: Marijuana contains THC (tetrahydrocannabinol), which acts on the brain's cannabinoid receptors. Alcohol depresses the central nervous system. Trying to compare the two isn't even like comparing apples and oranges, says Gary Wenk, a professor of psychology and neuroscience at Ohio State University. "It's apples and vegetables. They're very different drugs." An extremely simplified explanation would be to say that THC largely has cognitive effects, like paranoia and a distorted sense of time, while alcohol mainly affects motor skills, making it hard to walk in a straight line and causing slurred speech. READ MORE AT: https://www.popsci.com/article/science/what-hap...

Logitech Harmony Elite Review: One remote to rule them all

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With support for most smart home platforms and the ability to control up to 15 devices, the Harmony Elite gives you dominion over both your home entertainment system and your smart home gadgets. Testing Setting up a Logitech Harmony remote previously required plugging it into your computer, running the company's MyHarmony desktop app, manually adding the individual devices you wanted to control within the app, and then syncing those devices back to the remote. Frankly, it was a pain. Even making a small change to the controls could be time-consuming. While you can still opt for this setup method with the Elite (it has a micro-USB port like previous Harmony remotes), Logitech has significantly streamlined the process by letting you do everything on your phone. READ MORE AT: https://www.popsci.com/logitech-harmony-elite-review-one-remote-to-rule-your-devices

This may be the most promising herpes vaccine ever

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Newsflash: You probably have herpes. This is actually okay. According to the World Health Organization, over two thirds of the global population have HSV-1 (commonly known as oral herpes or cold sores) and more than 10 percent have HSV-2, or genital herpes. Given that HSV-2 rates are much higher among women, urbanites, and minority groups than in the general population (and given that HSV-1 increasingly shows up as a genital infection instead of an oral one), herpes is easily the most common sexually transmitted infection. How did over 4 billion folks end up with one of the two strains of herpes simplex, and what can we do about it? It all comes down to the virus's ingenious method of infection—it's designed to evade your immune system so well that it can stay in your body for an entire lifetime. But scientists now believe they can stop herpes from using its slickest skills. In a study published Thursday in PLOS Pathogens, researchers describe a new vaccine designed to hit...