New Roof Installation vs. Repair. Just because your roof springs a leak doesn't mean you need to call a roofing contractor right away. It's important to distinguish the cost of a new roof -- almost $6,500 on average -- versus the much more affordable $550 to repair a roof.
Report Abuse. 1  Beginning Of The Modern Age. 2  No Age has an absolutely definite start (or finish). 3  Technically, the medieval period ended and the modern era began when Columbus discovered America, or at least some islands in the New World, in October 1492.  Every single day for the last ten thousand years.
The 21st century is the current century of the Anno Domini era or the Common Era, in accordance with the Gregorian calendar.It began on January 1, 2001, and will end on December 31, 2100. It is the first century of the 3rd millennium.It is distinct from the century known as the 2000s, which began on January 1, 2000 and will end December 31, 2099.n contemporary history, the 21st century began with the United States as the sole superpower in the absence of the Soviet Union, while China began its rise to becoming a superpower and the BRIC countries aim to create more balance in the global political and economic spectrum.