Please explain: How are diamonds grown in a lab?

Please explain: How are diamonds grown in a lab?

What exactly are lab-grown diamonds and how do they compare with the real thing?  Professors Tracey Rushmer and Rich Mildren explain. A diamond is a solid rock of carbon and the hardest known naturally occurring substance. Because diamonds also have some extraordinary...
Which is better – reading on screens or paper?

Which is better – reading on screens or paper?

Research suggests that reading on screens is a less effective way to absorb and retain information than reading the old-fashioned way, but why? And when so many of us are noticing shortening attention spans, how do we learn to concentrate on books again? In a world...