Problem: Evidence of infection in fossil remains is a subject of interest for paleopathologists, scientists who study occurrences of injuries and illness in extinct life forms. Signs of infection have been discovered in the bones of carnivorous dinosaurs. When present, however, these infections seem to tend to be confined to only small regions of the body. A skull attributed to the early carnivorous dinosaur Herrerasaurus ischigualastensis exhibits pit-like wounds surrounded by swollen and porous bone. The unusual texture of the bone around the wounds suggests they were afflicted by a short-lived, non-lethal infection. Scientists who studied the skull speculated that the bite marks were received in a fight with another Herrerasaurus. Other carnivorous dinosaurs with documented evidence of infection include Acrocanthosaurus, Allosaurus, Tyrannosaurus and a tyrannosaur from the Kirtland Formation. The infections from both tyrannosaurs were received by being bitten during a fight, like the Herrerasaurus specimen.
How did tyrannosaurs become invincible?
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Answer: unanswerable

Problem: The territory of modern-day Mexico was home to numerous indigenous civilizations prior to the arrival of the Spanish conquistadores: The Olmecs, who flourished from between 1200 BCE to about 400 BCE in the coastal regions of the Gulf of Mexico; the Zapotecs and the Mixtecs, who held sway in the mountains of Oaxaca and the Isthmus of Tehuantepec; the Maya in the Yucatan (and into neighbouring areas of contemporary Central America); the Purepecha in present-day Michoacan and surrounding areas, and the Aztecs/Mexica, who, from their central capital at Tenochtitlan, dominated much of the centre and south of the country (and the non-Aztec inhabitants of those areas) when Hernan Cortes first landed at Veracruz.
Who lived in the Yucatan?
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Answer: the Maya

Problem: Spielberg's next film, Schindler's List, was based on the true story of Oskar Schindler, a man who risked his life to save 1,100 Jews from the Holocaust. Schindler's List earned Spielberg his first Academy Award for Best Director (it also won Best Picture). With the film a huge success at the box office, Spielberg used the profits to set up the Shoah Foundation, a non-profit organization that archives filmed testimony of Holocaust survivors. In 1997, the American Film Institute listed it among the 10 Greatest American Films ever Made (#9) which moved up to (#8) when the list was remade in 2007.
What did Spielberg first win Best Director for?
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Answer:
Schindler's List