What is the history of the Siachen Glacier?

Ans : The Karakoram region’s Siachen glacier was first discovered in 1821 by British explorer Moorcroft. In 1848, Strachey and in 1949, Drew were the first to set foot on the Siachen glacier.  In 1861, the Survey of India’s Ryall drew a sketch of the Siachen glacier’s lower portion and calculated its length at 16 miles.