Normally, younger rocks are deposited above older ones, forming predictable geologic layers. In the North Sea, this process ...

Hamas militants have used an inverted red triangle to mark military targets. Pro-Palestinian protesters have also used it to vandalize homes.

"An epic exploration of possibilities. What If is a Webby Award-winning science web series that takes you on a journey through hypothetical worlds and possibilities, some in distant corners of the ...

The upside-down American flag, originally an apolitical symbol used by sailors to signal that their ship was in trouble, has since been adopted by both the political left and right in protest.

This Flag Day I called up experts to discuss what an upside-down flag means wand why the Trump-supporting right is using it. It's a potent nationalist symbol.

Inverted crosses visible as Pope Francis lay in state symbolise Saint Peter, the first pontiff, and are not a reference to satanism.

The symbol has gained traction on the right since the revelation that an upside down flag flew outside the home of Justice Samuel A. Alito Jr. in 2021.

The upside-down flag has come to represent the “Stop the Steal” movement, which falsely claims the 2020 presidential election was stolen from Donald Trump.

The upside-down flag has come to represent the “Stop the Steal” movement, which falsely claims the 2020 presidential election was stolen from Donald Trump.