ua-9539515
Home » Archives by category » Uncategorized

To catch a cactus thief: national parks fight a thorny problem

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

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 […]

Page 1 of 79123Next ›Last »