Visitors to the annual Vivid Sydney light festival wear matching illuminated suits alongside the Sydney Harbour Bridge on the second night of the light and sound show in Sydney, Australia, May 28, 2016. (Photo by Jason Reed/Reuters)

Just a week before Rio de Janeiro hosts South America's first Olympics, city residents expressed mixed feelings about the cost and security of the Games, while holding out hope they will bring joy to a nation facing economic and political crises. The conflicted thoughts mirror a recent survey by the Datafolha polling group showing that half of Brazilians were opposed to holding the Games, while 63 percent think the costs of hosting the event will outweigh benefits. (Photo by Pilar Olivares/Reuters)

Everyone wants to get something for nothing - whether it's a lucky upgrade that means you can turn left when you get on a plane instead or heading off into the economy seats, or even getting a few extra features thrown in for free when you buy a new car.

As some of the sharpest businesses around, no-one understands this quite as well as casinos and that's why they all have a system that they call comps. It's short for "complimentary offers" and these are special treats specially designed to reward you for your loyalty to the casino in question. They're basically bonuses.

Krastsvetmet, located beside the beautiful Yensei river in the metropolis of Krasnoyarsk, Russia, is a refinery of all types of precious metals on an industrial scale.

Astronaut Chris Hadfield Explains How to Wash your Hands in Space.

“Japanese artist and designer Makoto Tojiki innovatively uses light as his primary medium of expression. In his latest exhibition, No Shadow, Tojiki manipulates thousands of small hanging lights to create 3D images of a man and animals. I’m pretty amazed by how the artist is able to “see” the image while meticulously placing the lights. Makoto’s creativity doesn’t stop at light production; he is also involved in jewelry making and furniture design”. (Photos by Ryo Ishihara/Josh Rothman)

Picture dated October 2nd, 2022 shows the Northern Lights over Northumberland, United Kingdom. (Photo by Dan Monk/Bav Media)