As Britain marks David Livingstone's 200th birthday (pictured here) on Tuesday (March 19), Christians are being reintroduced to one of the greatest missionaries and explorers of the 19th century.  Photo courtesy Wikimedia Commons/National Portrait Gallery in London

Dr. Livingstone, I presume? Missionary icon turns 200

(RNS) On the 200th anniversary of David Livingstone’s birth, Christians are being reintroduced to one of the greatest missionaries and explorers of the 19th century. A new book, meanwhile, introduces a darker side to Livingstone’s globe-trotting career and the corrosive effect it had on his marriage.