A default app is the program that Windows uses automatically when you open a particular type of file, such as a song, movie, photo, or webpage. For example, you might have more than one photo-editing app installed on your PC. You can choose one of them to be the default app that starts whenever you open a photo.
The Kerio Crater Lake in Iceland. The Kerio Crater Lake (sometimes spelled Kerid) is located in the GrÃ­msnes area in south Iceland, and is one of the most photogenic volcanic crater in existence. Itâs a regular stop for tourists along the Golden Circle sightseeing route and one of the most-photographed features in this amazing landscape.
Biggest meteor craters on Earth. Vredefort, South Africa. Located at the south-west of Johannesburg, the crater is believed to have been made by an asteroid impact on Earth some two billion years ago. With an estimated radius of 118 miles (190 km), the crater is reportedly the site of the largest energy release in the world.