For example, a form of malware called Joker or 'Bread' was found on seemingly innocent apps relating to, among other things, photo enhancement or wallpapers for your phone. The app would ask for ...

Once you’ve downloaded the app and set it up as you like, make sure to navigate to the Information tab in the left-hand menu.

Choose from 70,575 Laptop Wallpaper stock illustrations from iStock. Find high-quality royalty-free vector images that you won't find anywhere else.

This is a collection of illustrated posters in NASA's annual celebration of Earth Day. High resolution printable PDF files are available for download by clicking on each image.