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burn-up Simulating

Simulating burn-up on reentry using a plasma wind tunnel

This is a video simulating the burn-up of a Solar Array Drive Mechanism during atmospheric reentry using a plasma wind tunnel. This Solar Array Drive Mechanism (SADM) has the essential task of keeping a satellite’s solar wings trained on the Sun, maintaining mission operations. But its bulky nature presents a problem in terms of space…

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‘The signs

‘The signs are there.’ Is US democracy on a dangerous trajectory?

Today the Monitor begins a periodic series of conversations with thinkers and workers in the field of democracy – looking at what’s wrong with it, what’s right, and what we can do in the United States to strengthen it.Lee Drutman is a senior fellow in the Political Reform program at New America, a Washington think tank. This…

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Nassib Raiders

Raiders’ Carl Nassib becomes NFL’s first openly gay player

Las Vegas Raiders defensive end Carl Nassib on Monday became the first active NFL player to come out as gay.Mr. Nassib, who is entering his sixth NFL season and second with the Raiders, announced the news on Instagram, saying he wasn’t doing it for the attention but because he felt representation and visibility were important.“I just wanted…

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discovered ladybugs

Discovered: How ladybugs stick to surfaces without losing legs at takeoff

Figure 1. Ladybird beetle on a glass surface. Its white tarsal setae can be seen in contact with the surface. Credit: National Institute for Materials Science NIMS, the University of Tokyo and the University of Kiel have jointly ascertained the tarsal adhesion mechanisms employed by ladybird beetles, which had been debated for decades. Strong adhesives…

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Clear first

First clear view of a boiling cauldron where stars are born

The RCW 49 galactic nebula pictured above is one of the brightest star-forming regions in the Milky Way. By analyzing the movement of carbon atoms in an expanding bubble of gas surrounding the Westerlund 2 star cluster within RCW 49, a UMD-led team of researchers have created the clearest image to date of a stellar-wind…

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Makeup putting

Putting makeup on spiders does not change their chances of being eaten by a predator

Male Habronattus pyrrithrix (a) and female Habronattus pyrrithrix (b). Note the conspicuous dorsal stripe pattern of the male and the cryptic dorsal coloration of the female. Credit: Royal Society Open Science (2021). DOI: 10.1098/rsos.210308 A team of researchers from the University of Florida and Arizona State University has found that removing black stripes on male…

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Assessment shows

Assessment tool shows 33 aquatic species worldwide pose ‘very high risk’ of invasion

Cane toad. Credit: Wikipedia. A global risk-assessment tool shows 33 nonnative aquatic species worldwide pose a “very high risk” of becoming invasive in current and future climate conditions. “These species readily establish, spread and have severe impacts across several regions of the world,” said Jeff Hill, a UF/IFAS professor of fisheries and aquatics and a…

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bumble Midwest

Midwest bumble bees declined with more farmed land, less diverse crops since 1870

Credit: University of Wisconsin-Madison As farmers cultivated more land and began to grow fewer types of crops over the last 150 years, most native bumble bee species became rarer in Midwestern states. New research reveals that these species declined while the average number of different crops grown in these states was cut in half and…

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France Watch

How to Watch the 2021 Tour de France in the U.S.

stock illustration/shutterstock.comIf you’re a fan of pro cycling, there’s no bigger show than Le Tour de France. From June 26th to July 18th, 2021, the best road racers in the world will show up to show out, fighting for that famed yellow jersey. Even if you’re not interested in bike racing, Le Tour is an…

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recycle Where

Where Is the “Recycle Bin” on a Mac?

If you’re familiar with the Windows 10 Recycle Bin for deleting files and you just switched to Mac, you might wonder where the equivalent is on a Mac. It’s called “Trash,” and it’s located in the Dock. Here’s how to use it. The Recycle Bin Is “Trash” or “Bin” on a Mac Since 1984, all…