The United States and Japan are developing research submersible systems that will be able to explore the ocean floor's deepest spot: the 10,920-m Challenger Deep at the southern end of the Marianas Trench off the Mariana Islands. Sketch of the Shinkai 6500, a
Construction Time of the the Ming Wall. The Great Wall at Badaling. Over 2,000 years, many imperial dynasties and kingdoms built, rebuilt, and extended walls many times that subsequently eroded. The latest imperial construction was performed by the Ming Dynasty (1368â1644), and the length was then over 6,000 kilometers (3,700 miles).
  Answer   It took Nehemiah 52 days to rebuild the walls of Jerusalem.   Nehemiah 6:15 (Holman Christian Standard Bible) 15 The wall was completed (A) in 52 days â¦ , on the twenty-fifth day of the month Ellul. (B). + 61 others found this useful. Answer   It took Nehemiah 52 days to rebuild the walls of Jerusalem.   Nehemiah 6:15 (Holman Christian Standard Bible) 15 The wall was completed (A) in 52 days â¦ , on the twenty-fifth day of the month Ellul. (B). + 61 others found this useful.