Two that I know of are a sextant, and maybe an astrolabe
<span>Tthe way that they display landmasses.</span>
La Ramblas is the central boulevard in Barcelona, and it is also the one main tourist's attraction in the city. It is approximately 1.2 kilometers long with Port Vell at the Southernmost end and Placa Catalunya at the Northernmost end. It can also be divided into seedy and non-seedy areas. Attraction in Ramblas includes live performances, human statue art, an artist that draw your portrait or caricature and the Erotica Museum.
Scientific ocean exploration began in the 19th century, using wooden sailing ships. At that time, explorers had none of the technological sophistication and tools available today. A comparison of modern-day exploration with the late 19-century journey of the HMS Challenger<span>illustrates the progress that science has made in ocean exploration.</span>
C the size of glaciers in alaska
