Author: GIANLUCA MEZZOFIORE, CNN

Massive waterfall formed on Greenland's ice sheet

What may have been the world's tallest waterfall briefly formed on Greenland's ice sheet last year, draining a meltwater lake of 5 million cubic meters of water -- equivalent to 2,000 Olympic-sized swimming pools -- in just five hours.

NBA fan supporting Hong Kong ejected from game

A fan of the NBA's Philadelphia 76ers was removed from a preseason game against a Chinese team after he held signs and chanted in solidarity with pro-democracy protesters in Hong Kong.