Patrick Scolaro and Cory Sullivan of Boca Raton playfully duke it out wearing masks that were handed out to attendees of the Rock the Vote concert at Mizner Park after the debate. (Photo by Allen Eyestone/The Palm Beach Post)

This picture was taken in the 1890's and shows a group of loggers hauling a heavy load. It is hard to even picture how they got the logs stacked that high. It is also hard to imagine how they keep it from tipping over.

Wedges of an orange generate enough current and electrical juice – 3.5 volts – to power an LED. The fruit’s citric acid helps electrons flow from galvanized nails to copper wire in this 14-hour exposure. This image was published in September’s Visions of Earth, a trio of photos that appear in each issue of National Geographic. (Photo by Caleb Charland/National Geographic)

Mosaïcultures Internationales de Montréal is an international mosaiculture competition held in Montréal, Canada. According to their website, mosaiculture “is a refined horticultural art that involves creating and mounting living artworks made primarily from plants with colourful foliage (generally annuals, and occasionally perennials).” The 2013 competition and exhibition opened June 22 and runs through September 29 at the Montréal Botanical Garden and features some 22,000 plant species and cultivars distributed throughout 10 exhibition greenhouses and 30 themed gardens.

A man walks with a giant rake during carnival celebrations in Zubieta January 27, 2015. Bell carrying dancers known as Joaldunak from Zubieta and neighbouring Ituren visit each other's villages performing a ritual dance to ward off evil spirits and awaken the coming spring. Alongside the dancers, villagers dress in bizarre and frightening costumes to harass and scare visitors. (Photo by Vincent West/Reuters)

A brave photographer managed to get within metres of an active volcano despite it spewing out lava waves over 140 metres high. Silhouetted against a fiery fountain of red, Icelandic photographer, Tómas Freyr Kristjánsson, 37, braved blistering temperatures to get as close the volcano as possible. Although very few were brave enough to get so close, Tómas managed to photograph nearby tourists to give some scale to the spraying molten rock, including that of a nearby motorcyclist. (Photo by Tómas Freyr Kristjánsson/Caters News)

“Hard for Life”. (Photo by Theo Vu Xuan/Sony World Photography Awards/WENN.com)

Spanish bullfighter Julian Lopez “El Juli” adjusts his montera (bullfighter's hat) before starting a bullfight at the Malagueta bullring in Malaga, southern Spain, April 4, 2015. (Photo by Jon Nazca/Reuters)