These powerful images capture the spear-wielding tribes of Papua new Guinea who believe they are possessed with the spirit of the crocodile. They show how the Kangunaman clansmen scar their backs to resemble reptile scales while the Huli Wigmen wear elaborate headdresses to signal they are ready for battle. (Photo by Trevor Cole/Media Drum World)

Engineer Thomas Dwyer stands with the new Bionic Exoskeleton next to Amanda Boxtel during its launch at the Excel centre on October 21, 2011 in London, England. The bionic device developed by Ekso Bionics is a wearable, battery-powered, robotic exoskeleton, designed to aid wheelchair users and those who have suffered from spinal chord injuries to stand and walk. (Photo by Dan Kitwood/Getty Images)

Crowd reaction outside the court for the Dr. Conrad Murray trial verdict on November 7, 2011 in Los Angeles, California. Murray was convicted in the 2009 death of pop singer Michael Jackson from an overdose of the powerful anesthetic propofol. Sentencing will take place November 29. (Photo by Toby Canham/Getty Images)

Hooded torch bearers lead the winter procession through the snow on February 4, 2012 in Huddersfield, England. Imbolc is a pagan festival that marks the half way point between the winter solstice and the spring equinox. Imbolc festivals celebrates the awakening of the land and the growing power of the Sun. (Photo by Bethany Clarke/Getty Images)

Elspeth McLean is a talented painter from Australia’s western suburbia. She is perhaps the most vibrant painter I have even seen, hence her degree and passion in Art Therapy. She has a strong belief that art has the power to bring immense joy into people lives and her vibrant creations accurately reflect that.

A solar-powered plane takes off from Jiangbei International Airport in southwest China's Chongqing Municipality, Tuesday, April 21, 2015. The Solar Impulse 2 departed Chongqing on Tuesday for a 1190-kilometer (642-mile) flight to the city of Nanjing in eastern China, the sixth leg of its around-the-world flight. (Photo by Chinatopix via AP Photo)

A man dressed as Hindu goddess Kali, the goddess of power, performs with a burning camphor tablet on his tongue during a religious procession ahead of the “Kumbh Mela”, or Pitcher Festival, in the northern Indian city of Allahabad January 6, 2013. During the festival, hundreds of thousands of Hindus take part in a religious gathering at the banks of the river Ganges. The festival is held every 12 years in different Indian cities. (Photo by Jitendra Prakash/Reuters)

“A robot suit that can help the elderly or disabled get around was given its global safety certificate in Japan on February 27, 2013, paving the way for its worldwide roll-out”. Photo: Robot suit “Hybrid Assistive Limb (HAL)” worn by a man developed by University of Tsukuba is seen lifting a 30kg weight during 2005 International Robot Exhibition on November 30, 2005 in Tokyo, Japan. By wearing the power suit, it makes it easier to move and lift heavy things. (Photo by Koichi Kamoshida)