what is the strongest material in the world?
438910
The question has two answers.  Materials that are strongest in compression are not necessarily strongest in tension or bending (stiffness).  Diamond is likely the strongest material in compression because it was forged deep within the earth under tremendous pressures (and can be made in the lab under great concentrated pressure).  The strongest material in tension is likely a carbon fiber (especially on a weight/volume basis).  However, to be useful the carbon fibers are generally bonded together into ropes or sheets using various resins (like fiberglas sports cars?) and the strength of the composit depends on the type (tow) of carbon fiber, how produced (production temperature and even tensioning during production) and the strength of the resin (especially at operating temperature).  Carbon nano-tubes will likely produce the strongest carbon fibers under tension and some folks even plan to use them to tether space satelites to the earth!
1097722
Steel is stronger, in both tensile and compressive strength. Chalk crumbles.
879268
Zinc is by far the best element. I also like plutonium.  It's just fun to say. "Plutonium."
145529
I think it might be Aerogel.\nIt is actually quite strong for its weight, being made up of about 99.8% air\n\nSee this picture of a block of aerogel supporting a bick,\nhttp://www.unitednuclear.com/aerogelc.jpg
317921
magnetic materal. \n\nMagnets that you see every day, like the kind people use on refrigerators, are usually made of iron
203896
I think gorilla glue is the strongist glue in the world but it can expand five time more than regular glue
268308
Carbon fibers are stronger, stiffer and lighter than glass, aluminum or steel and exhibits less thermal growth.  See the link.  Carbon nanotubes will perform even better if they can ever be cheaply mass produced.
93827
Diamond. It is pure carbon.
923291
That depends on what you mean by the "entire world".  Planet earth is pretty much 100% material.  Any planet, or collection of planets, is also 100% material.\n\nBut the sun is plasma, and composes most of the mass in the solar system.  So the solar system is closer to 99% plasma, 1% material.\n\nBut those pesky astronomers were having trouble with some equations - seems like there was lots more stuff out there than plasma and material, but they couldn't find it.  Until recently.  They discovered load of new stuff, call "dark energy" and "dark matter" (since you can't see it from here, it must be 'dark', right?)\n\nTurns out most of the mass of the universe is dark energy and dark matter (about 95%), with the remaining little bit of plasma and regular matter.
686505
something deeeep, and strong
601338
Of course.  The diamond is the hardest substance, but definitly not the strongest.  If the diamond were on a suffieciently smooth and hard surface, the diamond would easily succumb to the pressure.\n\nIf diamonds are strong enough to hold up gross weight, how is it that we can cut them with simple hand tools the gem cutters use.  They are not.  Don't confuse hardness with strength.\n\nI think there is a story about a massive diamond found in the US that was smashed on an anvil because it was thought that it would resist the hammer if it were a true diamond.  It ended up being a diamond but was practically worthless compared to the original stone.
1144646
Stronger in terms of physical power:\n\n\nS P I D E R M A N
554679
The strongest and most capable will survive
406065
Brazil. because they won the most worldcup and they are the strongest.
481549
Super glue, but epoxy is the strongest glue ever. Super glue can also only be used on non-porous things.
876010
all kinds of organi materials
105033
steel is used most often. Chevy trucks have a hydroformed steel frame that's stronger. some car have aluminum but it's rare and some high performance cars have different material but are expensive and rare