CC0 License for Images:

The creator of this image hereby releases it into the public domain under the Creative Commons CC0 1.0 Universal (CC0 1.0) Public Domain Dedication.

This license applies worldwide. You are free to copy, modify, distribute, and use the image, even for commercial purposes, without asking for permission. 

However, this license does not apply to the depiction of copyrighted material, which remains subject to the rights of the respective copyright holder.