Launched into orbit in 1973, Skylab was the first US space station. It carried a laboratory for studying the human body’s adaptation to weightlessness and a powerful solar telescope. Three successive astronaut crews conducted research aboard Skylab for a total of 171 days in 1973–74. Though Skylab was intended to be reused, increased solar activity caused its orbit to degrade faster than expected. In 1979, the 75-tonne station reentered Earth’s atmosphere and broke up. Where did the debris land? Discuss
Source: The Free Dictionary
This annual observance in 
Peace was a notorious English burglar and murderer whose life spawned many romanticized works of fiction, including dozens of novels and films and even a comic strip. After stints in prison and a criminal career spanning decades, Peace was finally captured and imprisoned on charges of burglary and the attempted murder of a police officer. He was then tried for a past murder and was sentenced to death. Peace is mentioned by name in what Sherlock Holmes short story? 
The Black Death was a form of bubonic plague that was pandemic throughout Europe, the Middle East, and much of Asia in the 14th century. Thought to have been caused by the bacterium Yersinia pestis, it killed between one-third and half of Europe’s population and at least 75 million people worldwide. Recently, it has been argued that the Black Death was not caused by bubonic plague, at all, but by what? 
More than a month after Confederate General Robert E. Lee surrendered to Union General Ulysses S. Grant at Appomattox Court House, ending the American Civil War, fighting continued in other regions. The Battle of Palmito Ranch was fought in Texas on May 12-13, 1865, and was the last major clash of arms in the war. It ended with a Confederate victory, with 118 Union soldiers killed and a few dozen rebels wounded. Who was the last casualty of the battle—and likely the last of the war? 
On Old 
Born and raised in India, English physician Ronald Ross joined the Indian Medical Service after completing medical school and undertook the study of malaria, then a disease that was not well understood. After years of research, he demonstrated the malarial parasite, Plasmodium, in the stomach of the Anopheles mosquito, identifying the disease’s mechanism of transmission. His discoveries earned him a Nobel Prize in 1902. When is World Mosquito Day, instituted by Ross, observed? 
The Merkava series of main battle tanks is developed and manufactured by Israel Military Industries, Ltd for the Israel Defense Forces. It is designed to ensure crew survival, battle perseverance, and quick revival in case of bad damage, though it is still is vulnerable to remotely operated land mines. The heavily shielded engine is placed at the front of the tank, while the crew is able to escape through doors at the rear. When and why did Israel decide to develop the Merkava? 
I needed some real danger and some mortal risk to run, to tranquilize me.