Cats have been a popular subject on the internet since the rise of email in the 1990s. Images and videos of domestic cats are some of the most viewed content on the World Wide Web, leading to cats being described as the unofficial mascot of the Internet. The first cat video on YouTube was uploaded in 2005 by YouTube co-founder. Cat memes gained popularity on the internet in the mid-2000s . However, the history of cat memes can be traced back to at least the 18th century, where authors and artists have inscribed meaning onto cats in a variety of media. Cats have historically been associated with magic and have been revered by various human cultures, such as the ancient Egyptians worshipping them as gods. The popularity of cats on the internet is culturally-specific, according to Vogue magazine.