Gas masks? Yes. But no, those aren't deadly stuff; they're just onions. Back in the days, soldiers used gas masks so that they won't cry when peeling onions.

This is a photo of two soldiers taken in Tobruk. The date of this photo? October 15, 1941 -- taken during the Siege of Tobruk. Tobruk is a city located in Eastern Libya. It was a military post during World War II.

A siege is kind a military operation where the enemy forces surround a structure or building, or a town. Then enemy forces cut off essential supplies so that those besieged in the premises would eventually surrender.

Some time in April to August of 1941, about 14,000 Australian soldiers were besieged in the military post by a German-Italian army. Torbuk endured repeated ground assaults and bombings. By August, half of the Australian garrison was relieved and the rest followed by September until October. The siege ended on December 10, 1941. The Casualties? 749 dead, 1,996 wounded, and 604 were taken as prisoners.

Because ever since, advertising concepts have always been out of the box. This was how they advertised Atabrine during the period where Malaria broke out as an epidemic in the United States.

An enemy common to everyone during World War II was Malaria. Malaria is a fatal disease caused by Plasmodium, a genus of parasitic microorganisms. Quinine was the drug of choice to treat Malaria. However, 90% of the world's supply is in Java, a territory that was lost to the Japanese during the war. As such, researchers ventured into new anti-malaria drugs.

Atabrine was available in little yellow pills that tasted very bitter. It wasn't as good as Quinine but it was the next best thing. Likewise, it had several side effects (but they were of course, not harmful). Typically, it causes the skin to appear yellowish in color. In some rare occassions, it causes nausea and vomitting.

Sadly, Atabrine did not destroy the malaria parasite in the liver, but only in the bloodstream. Like what we said, it wasn't as good as quinine but it was the next best thing.

This is Bill Gates. A very happy Bill Gates. He is obviously so happy to show off the CD-ROM.

Who doesn't know Bill Gates? Yup, the business magnate who happens to be the richest person in the world! Well to start not many people know that his full name is actually William Henry Gates III and "Bill" is just his nickname.

CD-ROM is an acronym that stands for Compact Disc Read-Only Memory. It's basically a CD that can be read by a computer through its optical drive. This particular photo was taken in 1994 -- a fruitful year for Microsoft.

In that very year, a number of products on CD-ROM were released for MAC and Windows. It includes the 1994 Edition of Encarta, Cinemania 1994, Bookshelf 1994, Windows Sound System 2.0, and Office 4.2 for Windows, among many more.

Oh no, he's not sick. He's not on drugs either. This is what you will actually look like if you've been exposed to tons of laughing gas.

Laughing gas technically isn't any laughing matter. It's got health hazards. Too much exposure to it can cause mental and manual impairment, oxygen deprivation, vitamin B12 deficiency, and infertility among many others. What we're trying to say is -- too much of it can actually kill ya!

Scientifically known as nitrous oxide, it is a chemical compound that's colorless. It's an odorless gas which is non-flammable. Nitrous oxide has a handful of medical uses. It has potent analgesic and anaesthetic effects.

Yes, we know it is something that must be taken seriously. But you might wonder, why do they call it laughing gas? Well, inhaling it gives you what they refer to as a "euphoric effect". It's that kind that dulls your awareness and gives you that calming effect to that point that something you end up with a giddy feeling that eventually leaves you laughing.

Do you see any familiar faces? Yes, Adolf Hitler was the best man at the wedding of Joseph and Magda Goebbels.

Now you might wonder, who in the world are Joseph and Magda Goebbels and why is Hitler the best man at their wedding? Paul Joseph Goebbels was actually one of Hitler's closest associates and his devoted friend. They were so close that in Hitler's last will and testament, Joseph was appointed Reich Chancellor of the Nazi Party.

As everyone knows, Hitler committed suicide on April 30th of 1945. With the same principles in life, people expected Joseph to likewise take his own life rather than to be taken by the enemy. But no, he did more than that. On the night of their death (yes, their because he committed suicide with his wife since she was also a member of the Nazi), he asked a dentist to inject their children with morphine to make them unconscious. Later, an ampule of cyanide were crush inside of the children's' mouths. So yeah, he literally took his family with him to the afterlife.

Yes, that is who you think it is. Terminator himself! This is Arnold Schwarzenegger during one of the body building competitions he joined.

Arnold Alois Schwarzenegger is undeniably one of Hollywood's biggest stars... and not to mention one with a tongue twister last name! Who would ever thought that a professional bodybuilder from a small village in Austria would be where he is now? It's literally a "rags to riches" for this Austrian who migrated to the United States in 1968 to live the American Dream.

He started weight training at a young age of 15. He then won Mr. Universe when he was 20 years old. Not only did he win Mr. Universe, he also won Mr. Olympia seven times. So naturally, he caught the eye of those in the film industry.

His breakthrough film? Conan the Barbarian in 1982. But of course, he is credited for the iconic role of The Terminator which led to a franchise with a total of 4 installments. He also starred in Commando, Predator, Total Recall, Kindergarten Cop, and much more.