To catch a cactus thief: national parks fight a thorny problem
In the US alone, sales of cacti and succulents surged 64% between 2012 and 2017; a market that is now estimated to be worth tens of millions. But rising demand has met a thorny problem: cacti are extremely slow-growing, with some species taking decades to grow from seed to full maturity. Hence, many opt for the shortcut: pulling […]
SIRIUS The Brightest Star Will Disappear February 18
An asteroid will block the brightest star in the night sky On February 18, 2019 a four-mile wide asteroid is going to pass in front of Sirius, the sky’s brightest star, and block its light for just under two seconds. Can a 7-kilometer-wide asteroid make Sirius disappear? You bet it can. That just might happen on Monday […]
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