Why Do I Blush at the Start of a Speech?

The mechanics of how a blush happens are straightforward. Underneath the skin of your face and neck is a lacework of tiny blood vessels called capillaries, which dilate under the influence of adrenaline to allow more blood and oxygen to flow. And a blush isn’t something you can fake. Unlike most human expressions, you can’t force a blush to appear on your face. (Or, sadly, demand that your capillaries shrink back to size.) (Read the full story)

Breathing Fire

“I remember being at Lowell High School, looking out the window, daydreaming, and I saw a line of mounted police,” says Kitty Tsui . “And I knew where they were going, because we all knew what was going on at San Francisco State.” (Read the full story)

Humans Have Been Causing Earthquakes in Texas Since the 1920s

Earthquakes triggered by human activity have been happening in Texas since at least 1925, and they have been widespread throughout the state ever since, according to a new historical review…The earthquakes are caused by oil and gas operations, but the specific production techniques behind these quakes have differed over the decades, according to Cliff Frohlich, a senior research scientist and associate director at the Institute for Geophysics at the University of Texas at Austin. Frohlich said the evidence should lay to rest the idea that there is no substantial proof for human-caused earthquakes in Texas, as some state officials have claimed as recently as 2015. (Read the full story)