By Richard Brill, Special to the Star-Advertiser on February 15, 2019
By Richard Brill, Special to the Star-Advertiser Posted on February 15, 2019
Outside the window, 7 miles up, the wings of the jet airliner slice through the invisible air that seems magically to keep it aloft. It reminds me that we are immersed in Earth’s invisible atmosphere all of the time.
All paint inside a can is black until the can is opened. Strange as it might seem, it is true. What we see as color is a matter of perception, intrinsic properties of an object and the light that illuminates it.
By Richard Brill on November 16, 2018 • Updated on November 16, 2018 at 1:45 am
By Richard Brill Posted on November 16, 2018 • Updated on November 16, 2018 at 1:45 am
Zero, nothing, zilch, nada? The number zero is a misunderstood enigma. Its place in our number system is relatively recent, appearing much later than the Arabic numerals we use to display number digits.
By Richard Brill, Special to the Star-Advertiser on October 19, 2018
By Richard Brill, Special to the Star-Advertiser Posted on October 19, 2018
Although we cannot measure “life” directly, astronomers have confidence that soon we will be able to reliably detect the chemicals of life such as oxygen, methane and nitrogen in the atmospheres of distant planets.
We use metals for so many different purposes that a list would go on page after page. The most common and most well known are iron and aluminum. It just happens that these are the two most abundant metals in Earth’s crust.
The recent surge in debate among supposedly educated people about the shape of planet Earth is surprising, considering Eratosthenes, an ancient Greek scientist, measured its circumference 22 centuries ago.