Medicare Eligibility. Do you have questions about what it takes to be eligible for Medicare? In this article, weâll outline the Medicare eligibility requirements so that you can enroll in the Medicare program, which is overseen by the Centers for Medicare & Medicaid Services (CMS) via Medicare.gov.
The first compass was invented around 247 B.C. in China and by the eleventh century it was used for navigation.In medieval Europe around 1300 the dry compass was invented and was replaced by the liquid filled magnetic compass in the early twentieth century.A compass is a navigational instrument which is used for determining the direction related to the Earthâs magnetic poles.n medieval Europe around 1300 the dry compass was invented and was replaced by the liquid filled magnetic compass in the early twentieth century. A compass is a navigational instrument which is used for determining the direction related to the Earthâs magnetic poles.
Middle Ages. 1  800 â The streets of Baghdad are paved with tar. 2  Late 10th century â Kamal invented in Arab world. 3  1044 â Compass invented in China. 4  13th century (or before) â Rocket invented in China. 5  1350 â Compass dial invented by Ibn al-Shatir.