or polonium, which only requires one gram of vaporized substance to wipe out 50 million people

But did you know that 70 cups of coffee contains

enough caffeine to kill a 70kg person?

This amount of caffeine can trigger heart palpitations or even cardiac arrest

Prefer alcohol as your beverage of choice?

13 consecutive shots could be lethal too.

Because alcohol is a depressant,

the area in the brain controlling basic life functions

like breathing and heart rate begin to shut down

Too much liquid in general can be dangerous as well

Though it takes a lot, water intoxication from around 6 litres causes brain cells to swell

leading to headaches, seizures, comas, and even death in extreme cases

But if you stop drinking water, or consume too much salt

your cells will start to shrink, leading to the condition known as hypernatremia

48 tsps of your favourite seasoning at once

is enough to trigger this reaction

also leading to seizures, coma, or even death

Stick your head under water or simply hold your breath

and it takes around 4 minutes without oxygen to cause severe brain injury

and at 6 minutes, you could die

However, in extreme cases, some free divers have been able to hold their breath for over 20 minutes

Cherries can also deprive you of oxygen

Say what?

If you ever swallow a cherry pit, you shouldn't worry too much

just don't bite into one

One or two ground cherry pits contains

enough cyanide to take you down

and these cyanide ions inhibit the enzyme Cytochrome C Oxidase

causing your cells to be unable to use oxygen

Speaking of a lack of oxygen,

it's at around 8000ft above sea level that

our bodies can no longer acclimatize to the limited oxygen

This is known as the "death zone" in mountaineering

Simply being too tall can also kill you

In the 1930s, Robert Pershing Wadlow reached 8'11"

This height put severe stress on his circulatory system

and structural pressure on his bones

and he died at the young age of 22

Researchers have hypothesised that every inch above 5 feet takes 1.3 years off your life

If you're worried about your pet's life, you may have heard not to give them chocolate

The same chemical, Theobromine, can kill us too

Our bodies metabolise Theobromine more effectively though

with 1000mg/kg being lethal to humans

which is the equivalent of 85 full-sized chocolate bars at once

You may want that many chocolate bars after getting high

however, you would need to eat 22kg of marijuana to be at risk of death

Smoke it, and the amount required to overdose is comically high

Approximately 680kg of pot within 15 minutes would induce a lethal response

Which may explain why there has never been a single documented death

directly linked to consuming too much marijuana

Blasting some amazing music may be fun as well,

just don't go above 185 decibels

The amount of air pressure from this could burst your lungs, or

alternatively, create an embolism that travels to your heart

It may also keep your neighbours up all night

And, while it's uncertain how long the body can survive without sleep,

studies on rats who underwent continuous sleep deprivation

lasted around 2 weeks before dying

The world record in humans is just over 11 days

but surprisingly no long term effects were documented after he caught up on his sleep

Got a burning question you want answered?

Ask it in the comments or on Facebook and Twitter

And if you liked this video

check out our previous one called "This is 200 calories"

where we break down and compare different foods and drinks

to put things in perspective

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