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Docusign Tower (Wikipedia) Docusign Tower, previously the Wells Fargo Center, is a skyscraper in Seattle, in the U.S. state of Washington. Originally named First Interstate Center when completed in 1983, the 47-story, 574-foot (175 m) tower is now the ninth-tallest building in the city, and has 24 elevators and 941,000 square feet (87,400 m2) of rentable space. The design work was done by The McKinley Architects, and it is owned by Chicago-based EQ Office.

Bird (Wikipedia) Birds are a group of warm-blooded vertebrates constituting the class Aves (/ˈeɪviːz/), characterised by feathers, toothless beaked jaws, the laying of hard-shelled eggs, a high metabolic rate, a four-chambered heart, and a strong yet lightweight skeleton. Birds live worldwide and range in size from the 5.5 cm (2.2 in) bee hummingbird to the 2.8 m (9 ft 2 in) common ostrich. There are about ten thousand living species, more than half of which are passerine, or “perching” birds. Birds have wings whose development varies according to species; the only known groups without wings are the extinct moa and elephant birds. Wings, which are modified forelimbs, gave birds the ability to fly, although further evolution has led to the loss of flight in some birds, including ratites, penguins, and diverse endemic island species. The digestive and respiratory systems of birds are also uniquely adapted for flight. Some bird species of aquatic environments, particularly seabirds and some waterbirds, have further evolved for swimming. The study of birds is called ornithology.