Darrell M. Williams

67 Flips | 3 Magazines | 6 Likes | 6 Following | 37 Followers | @MrScience22 | Professor of Middle School Science

The law of conservation of mass - Todd Ramsey

Garb: Tech Support

Get the flexibility you need while tackling those server issues no one understands.<p>Ministry of Supply Archive Dress Shirt ($108). Ministry of Supply …

Never Mind Eyesight, Your Nose Knows Much More

The human eye can distinguish more than 2 million distinct colors. But scientists studying smell now say they have their vision colleagues beat: The human nose, they say, can distinguish more than a trillion different smells.<p>Yes, trillion with a T.<p>That new figure displaces a much more modest …

Light waves, visible and invisible - Lucianne Walkowicz

The uncertain location of electrons - George Zaidan and Charles Morton

Why don't oil and water mix? - John Pollard

What is the shape of a molecule? - George Zaidan and Charles Morton

How atoms bond - George Zaidan and Charles Morton

Why does ice float in water? - George Zaidan and Charles Morton

The strengths and weaknesses of acids and bases - George Zaidan and Charles Morton

Tickety-Tock! An Even More Accurate Atomic Clock

Scientists announced this week that they have created the most advanced clock in the world.<p>The clock, described this week in the journal <i>Nature,</i> is so precise that it would neither lose nor gain one second in about 5 billion years of continuous operation. That's pretty good, considering that the …

New Study Shakes Up Science On Midwest Quake Zone

One of the biggest earthquakes in U.S. history didn't occur in California. Or Alaska. It happened in the country's midsection some 200 years ago in an area where today seven states straddle the Mississippi River Valley.<p>And seismologists from the United States Geological Survey believe they've …

Is our Sun falling silent?

http://vod-pro-ww-live.akamaized.net/mps_h264_hi/public/news/world/1044000/1044753_h264_1500k.mp4?__gda__=1524619515_88a9da1b321a0c6c93e4107431f29813<p><b>"I've been a solar physicist for 30 years, and I've never seen anything quite like this," says Richard Harrison, head of space physics at the</b> …

How sugar affects the brain - Nicole Avena

Why Is Your BOTTOM in the MIDDLE?

The One Percent

<b>The One Percent</b><p>We now know the scale of the universe to within 1% accuracy. The results have been presented in an arxiv preprint (http://goo.gl/fXqjs7). It isn’t yet peer reviewed, but it has been submitted to the Monthly Notice of Royal Astronomical Society, and I suspect it will be accepted soon.<p>The data comes from the Baryon Oscillation Spectroscopic Survey (BOSS), which has measured the direction and redshift of about 1.2 million galaxies very precisely. The reason this is important is that …

One Wheel hands-on at CES 2014 | Engadget

Animal Loses Head But Remembers Everything

When I first saw this," says cell biologist Alejandro Sanchez Alvarado, "it was with total amazement."<p>This is a worm. It's called a planarian. It's about an inch long, and you'll find it gliding along the bottoms of rivers and ponds all over the world. It's very flat, like a moving bit of pasta — …

Radar explained in ten seconds

Time Dilation illustrated within ten seconds

What's it like at CalAcademy? | CalAcademy

What Color is Your Blood?

Fahrenheit, Celsius and Kelvin explained in ten seconds

What's below the tip of the iceberg? - Camille Seaman

Centripetal Force Penny - Sick Science! #157

Twist in Time - Sick Science! #158

3-D Scan And Print Right From Your Browser

Wave a sensor over an object and reproduce it, in the simplest setup we've seen to date.<p>3-D scanning is a technology with all the right pieces floating around, yet to be assembled into the final piece that's easy for everyone to use. The idea: using a small gadget, you can scan in a 3-D object, …

US scientists claim to have built the world's most accurate clock

US scientists say they have built the world's most precise clock, whose ticking rate varies less than two parts in one quintillion, or 10 times better than any other.<p>The clock, made from the element ytterbium, could be used for technological advancements beyond timekeeping, such as navigation …


Three things you need to understand about 3D printing to talk about it intelligently

Several of the biggest brains in 3D printing joined Quartz for a discussion about the future of the technology at General Assembly in New York City on July 16. Here are the three most interesting things we learned.<p>1. Customization is effectively free with 3D printing<p>The upsides of 3D printing are …

3D Printing