The first successful flight of a hot-air balloon took place in the fall of 1783. No humans were aboard that day for the 15-minute flight. Now, people can fly thousands of miles for days at a time ...

While balloons are fun, helium is actually used for loads of very ... Image source, Getty Images Image caption, 'He' is the chemical symbol for helium in the periodic table, which you can find ...

Chef Grant Achatz serves up some very unusual dishes, and one of the most popular is an edible helium balloon. Customers are served the balloons and encouraged to suck in the helium before eating it.