Blue Tongue Lizard Blue-tongue Skink. Blue tongue lizards come in a variety of sizes and colours but they all have distinctive blue tongues. Their blue tongue is a defensive mechanism. When the lizard is threatened it sticks out its large blue tongue and hisses loudly to scare off predators.
A skyscraper ad is a tall and narrow banner advertisement usually placed to the right of content on a Web page. Standard dimensions for a skyscraper ad are 160 X 600 pixels. Like another popular type of Internet ad, the leaderboard, the skyscraper offers an advertiser a large space for a message.
The world's tallest artificial structure is the 829.8 m (2,722 ft) tall Burj Khalifa in Dubai, United Arab Emirates. The building gained the official title of  Tallest Building in the World  at its opening on January 4, 2010. It is followed by the Tokyo Skytree, as the tallest tower, and the KVLY-TV mast.