Usually diamonds because they are so deep in the world, you have to dig a lot to find them.
human interaction
diamond is the hardest thing on earth
yes diomand is the hardest thing on earth
the hardest thing about arthritis is dealing with the horrible pain
The hardest thing about barrel racing is the ground.
There is no such thing as a hardest fraction. Something which you find hard someone else may find easy and something which that person find hard some third person might find easy and so on.
Confucius said "The hardest thing of all is to find a black cat in a dark room, especially if there is no cat." The phrase means that you cannot find something that is not there or that you cannot find something when it did not exist to begin with.
I have to say the hardest thing about grade 7 is the bullying
Nothing it is sure. Sincere involvement and steadfastness would definitely make anything easier to follow
There can be no simple answer. First, it is not clear that the hardest thing to know - if such a thing exists - has been found yet. Maybe it is too hard even to find. Also, different people find different things hard: not just in mathematics but in every aspect of life.
The Hardest Thing - album - was created on 2009-01-25.
This is, quite possibly, the hardest thing to find on the internet.