Problem: In 1967, Schwarzenegger won the Munich stone-lifting contest, in which a stone weighing 508 German pounds (254 kg/560 lbs.) is lifted between the legs while standing on two foot rests.
In what competition did Schwarzenegger have to lift over 500 pounds while balancing on foot rests?
The answer is the following: Munich stone-lifting contest

Problem: In 1260, control passed to the Mamluk sultans of Egypt. The country was located between the two centres of Mamluk power, Cairo and Damascus, and only saw some development along the postal road connecting the two cities. Jerusalem, although left without the protection of any city walls since 1219, also saw a flurry of new construction projects centred around the Al-Aqsa Mosque compound (the Temple Mount). In 1266 the Mamluk Sultan Baybars converted the Cave of the Patriarchs in Hebron into an exclusive Islamic sanctuary and banned Christians and Jews from entering, which previously would be able to enter it for a fee. The ban remained in place until Israel took control of the building in 1967.
When did the Mamluk Sultan Baybars convert to the Cave of Patriarchs?
The answer is the following: 1266

Problem: Few species of reptiles or amphibians are found in Great Britain or Ireland. Only three snakes are native to Great Britain: the common European adder, the grass snake and the smooth snake; none are native to Ireland. In general, Great Britain has slightly more variation and native wild life, with weasels, polecats, wildcats, most shrews, moles, water voles, roe deer and common toads also being absent from Ireland. This pattern is also true for birds and insects. Notable exceptions include the Kerry slug and certain species of wood lice native to Ireland but not Great Britain.
Which snakes are considered native to the British Isles but not Ireland?
The answer is the following: European adder, the grass snake and the smooth snake

Problem: "Funday Night at the Movies" was replaced in 2008 by "Essentials Jr.", a youth-oriented version of its weekly series The Essentials (originally hosted by actors Abigail Breslin and Chris O'Donnell, then by John Lithgow from 2009 to 2011, and then by Bill Hader starting with the 2011 season), which included such family-themed films as National Velvet, Captains Courageous and Yours, Mine and Ours, as well as more eclectic selections as Sherlock, Jr., The Music Box, Harvey, Mutiny on the Bounty and The Man Who Knew Too Much.
Who hosted Essentials Jr. between 2009 and 2011?
The answer is the following:
John Lithgow