Blood Falls is an outflow of saltwater, flowing from the tongue of the Taylor Glacier in Antarctica. The reddish deposit was found in 1911 by the Australian geologist Griffith Taylor who first attributed the red color to red algae, but later it was proven to be due an iron-rich underground saltwater lake that was trapped by the encroaching glacier at least 1.5 million years ago. The temperature of the water is -5 Celsius, but it’s so salty that it doesn’t freeze.
A snow roller is a rare meteorological phenomenon in which large snowballs are formed naturally as chunks of snow are blown along the ground by wind, picking up material along the way, in much the same way that the large snowballs used in snowmen are made. Unlike snowballs made by people, snow rollers are typically cylindrical in shape, and are often hollow since the inner layers, which are the first layers to form, are weak and thin compared to the outer layers and can easily be blown away, leaving what looks like a doughnut or Swiss roll. (Source Wikipedia)
The Grand Canyon’s Pumpkin Spring, a limestone formation off the Colorado River, is a geological oddity. Although it might looks tempting, it isn’t quite as secure as it might seem. Some water spills over the top, but that which remains in the pumpkin-pool, turns into a caustic murky green, a deadly mixture of arsenic, copper, zinc and lead. Limited exposure is not fatal, but better look but don’t touch!
Massive Halloween craziness from the early 1900s.