The Vietnam Slide Project was created by photo editor Kendra Rennick, who began collecting photo slides after a close friend lost her father, a Vietnam veteran. Her friend found a box of slides that her father had taken while in Vietnam and from there Rennick has continued to collect photographs that Vietnam veterans took during their tours of duty. Here: A photo taken from the collection of D.Thornton, who served in the First Air Cavalry division of the United States Army. (Photo by D.Thornton/The Vietnam Slide Project)

These spectacular images of the universe are the finalists in the 2016 CWAS “David Malin” awards. The annual competition, which celebrates the best astronomy images taken by Australian photographers, is part of AstroFest 2016. The winners will be announced on 16 July. An associated exhibition opens the following day at the CSIRO Parkes Observatory visitors centre, and a second exhibition will also travel to selected venues around Australia. Here: Mars and its Rival Antares and the Rho Ophiuchi cloud complex. (Photo by Phil Hart/CWAS/The Guardian)

“Photoswapped: Mum and dads switch heads with their children in freakiest photos you'll ever see. It is a position that many young children would love to be in. And now these strange and sometimes unnerving images show what it would actually be like if babies swapped roles, and heads, with their mother or father. The photos, created by top advertising photographer Paul Ripke, are so eye-catching that they have swept across the world online”. (Photo by Paul Ripke/Barcroft Media via Fame Pictures)

Elephant fights off hyenas to save baby. “This is the incredible moment an elephant came to the rescue of one of its babies being attacked by a pack of hyenas. The elephant is seen charging at the hyenas to ward them off its offspring. The photos were captured by American photographer Jayesh Mehta, 47, in the Savuti region of the Chobe National Park in Botswana”. Photo: The elephant is seen charging at the hyenas to ward them off its offspring. (Photo by Jayesh Mehta/Caters News)

“24.27 N, 81.44 W. These coordinates mark the spot of the final resting place of an old brave soldier, the USS General Hoyt S. Vandenberg. In 2009 it underwent a complete change when the creaky steel monster became a mystical bearer of secrets. In May of that year, the Vandenberg was lowered down into the darkness of the ocean off the coast of Florida to become an artificial reef, where it would dwell in rigor mortis at a depth of 130 feet. This lively, animate, secretive nothingness, this menacing, wild emptiness would haunt and seduce the renowned Austrian photographer and passionate diver Andreas Franke...”. – The Sinking World (Photo by Andreas Franke)

This artwork created using the end of a drill is the work of Swiss photographer Fabian Oefner who captures the flight of paint in just one 40,000th of a second. His latest Black Hole series celebrates the physics of centripetal force and the effects it has on simple paint and a an ordinary drill with a metal rod connected on the end. The incredible result of Fabians work comes out looking like a picture taken on the Hubble Telescope of some cosmic event. (Photo by Fabian Oefner/Caters News)

Grand Rapids (Michigan) based illustrator and artist Scott Gundersen creates his portraits from thousands of used and recycled corks. Starting with a large photograph that’s transferred to a drawing, Gundersen pins each cork to the canvas, creating a correlation between the hues of the wine-stained corks and the value of light or shadow in the portrait. Scott Gundersen has made these incredible portraits, one using 3,621, 3,842 and the other using 9,217 natural wine corks.

Michael Hughes creates cool optical illusions by placing cheap souvenirs in front of famous landmarks. Michael has discovered the technique back in 1998 when he held up a postcard he bought for his daughter on the tourist platform at the Lorelei cliffs next to the river Rhine. “I was amazed because it just seemed to fill a massive grey hole that was in the sky and it was the exact position the photographer had taken the picture from,” said Michael to Daily Mail.