Almost all of the Earth's islands are natural and have been formed by tectonic forces or volcanic eruptions. However, artificial (man-made) islands also exist, such as the island in Osaka Bay off the Japanese island of Honshu, on which Kansai International Airport is located. Artificial islands can be built using natural materials (e.g., earth, rock, or sand) or artificial ones (e.g., concrete slabs or recycled waste). Sometimes natural islands are artificially enlarged, such as Vasilyevsky Island in the Russian city of St. Petersburg, which had its western shore extended westward by some 0.5 km in the construction of the Passenger Port of St. Petersburg.
The first season of Travelers has a score of 100% on Rotten Tomatoes based on nine reviews with an average rating of 8.0/10. Neil Genzlinger, writing for The New York Times, described the first season as "tasty", and "enjoyable science fiction", with "some attention-grabbing flourishes and fine acting". Hanh Nguyen, writing for IndieWire, describes the series as "fun and freaky," finding the series' appeal "in how the core group of five travelers adjust to life in our present," noting the "human nature in the travelers". Lawrence Devoe, of TheaterByte.com, called the series "tautly paced and suspenseful" with "well-developed characters", declaring that "Brad Wright has a real knack for creating futuristic series". Evan Narcisse, reviewing the first five episodes for io9, appreciated the moral dilemmas offered by the series premise and the awkwardness presented by the characters' interactions with their hosts' friends, colleagues, lovers, or caretakers: "This is a superhero show in double disguise, offering up clever explorations of the secret identity concept that touch on the guilt and contortions that come with living a double life." Netflix announced that the series was one of its "most devoured" series in 2017.