During his undergraduate studies, Ogston had learnt of Louis Pasteur's experiments with microorganisms and had observed first-hand Joseph Lister's use of carbolic acid as an antiseptic.

Locating source of a cholera outbreak, thus establishing the link between this infection and [fecal contamination in] water as its vector.

John Snow was one of the first physicians to study and calculate dosages for the use of ether and chloroform as surgical anaesthetics, allowing patients to undergo surgical procedures without the distress and pain they would otherwise experience.

On 7uly 1944, the perimeter of which Sgt. Baker was a part was attacked from 3 sides by from 3,000 to 5,000 Japanese. During the early stages of this attack, Sgt. Baker was seriously wounded but he insisted on remaining in the line and fired at the enemy at ranges sometimes as close as 5 yards until his ammunition ran out. Without ammunition and with his own weapon battered to uselessness from hand-to-hand combat, he was carried about 50 yards to the rear by a comrade, who was then himself wounded. At this point Sgt. Baker refused to be moved any farther stating that he preferred to be left to die rather than risk the lives of any more of his friends. A short time later, at his request, he was placed in a sitting position against a small tree. Another comrade, withdrawing, offered assistance. Sgt. Baker refused, insisting that he be left alone and be given a soldier's pistol with its remaining 8 rounds of ammunition. When last seen alive, Sgt. Baker was propped against a tree, pistol in hand, calmly facing the foe. Later Sgt. Baker's body was found in the sameposition, gun empty, with 8 Japanese lying dead before him.

11,000 Finnish troops lined up against 45-55,000 Russians. Finnish death toll 600, Russian death toll 27,500.

Normal T34 tank:

Erich Alfred Hartmann (19 April 1922 – 20 September 1993)...is the highest-scoring fighter ace in the history of aerial warfare.

Aerogel is a manufactured material with the lowest bulk density of any known porous solid.[1] It is derived from a gel in which the liquid component of the gel has been replaced with a gas. The result is an extremely low-density solid, with a notable effectiveness as a thermal insulator.

2.5kg of brick on 2g of Aerogel:


Aerogel protecting a flower from a bunsen burner:

generating a massive megatsunami measuring 524 m (1,719 ft). For comparison, the Empire State Building is 448 m (1,470 ft) high including its antenna spire. The wave possessed sufficient power to snap off all the trees up to 1,720 feet (520 m) high around the bay. Most of these were spruce, and most were 6 feet (1.8 m) thick. The wave stripped the soil down to the bedrock around the entire bay.

Simo Häyhä (December 17, 1905 – April 1, 2002), nicknamed "White Death" by the Red Army, was a Finnish sniper. Using a modified Mosin–Nagant in the Winter War, he has the highest recorded number (505) of confirmed sniper kills in any major war.
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He preferred to use iron sights rather than telescopic sights to present a smaller target (the sniper must raise his head higher when using a telescopic sight), for more reliable visibility (a telescopic sight's glass can fog up easily in cold weather), and aid concealment (sunlight glare in telescopic sight lenses can reveal a sniper's position). Another tactic used by Häyhä was to compact the snow in front of him so that the shot would not disturb the snow and reveal his position. He also kept snow in his mouth, so that the vapor of his breath would not give him away.

Nearly 20 percent of military service members who have returned from Iraq and Afghanistan — 300,000 in all — report symptoms of post traumatic stress disorder or major depression, yet only slight more than half have sought treatment...

…returning service members will cost the nation as much as $6.2 billion in the two years following deployment — an amount that includes both direct medical care and costs for lost productivity and suicide.