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Science on Instagram: "Salamanders are unique among vertebrates because they can regenerate entire limbs after injury. When a limb is lost, the wound heals without scarring, and cells at the site form a special structure called the blastema. The blastema contains undifferentiated cells that have the ability to grow into muscles, bones, blood vessels, and skin. Guided by signals from nerves and surrounding tissues, these cells gradually rebuild the limb in the correct shape and size. This remarka

Daily Overview on Instagram: "Durrat Al-Bahrain is a collection of 15 artificial islands, built in the Persian Gulf off the southern coast of Bahrain. Construction of the 5-square-kilometer (2-square-mile) site began in 2004 and has cost more than $6 billion to date. Some of the islands still remain uninhabited. Created by @dailyoverview Source imagery: NASA / Google Timelapse / Planet"