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Extremely Hard Science Quiz Even Einstein would scratch his head!
In physics, which Greek letter is used to denote wavelength?
A 'buckyball' is an allotrope of which element ?
What type of ocean water is more dense?
A group of jellyfish is called what?
CO2 is the chemical formula for which gas?
What year was the first transatlantic fibre-optic cable laid?
Which famous scientist first theorized the existence of photons?
Dogs' unique relationship with humans mean they are referred to as man's best what?
Which of these is NOT true of helium?
The wreck of The Umbria lies in which sea?
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Extremely Hard History Quiz, most people score only 3 out of 10.