I like to snorkel, how about you?
Yes I snorkel every summer in Thailand by equipping myself with a diving mask, a shaped breathing tube called a snorkel. 
Do you know where or when it originated?
Yes! It is thought that snorkelling may have bee around as long before as Aristotle since he mentioned it in Paris of Animals! 
Wow thats very interesting. What safety precautions should one have to take before and while snorkeling?
Well aside from just basic precaution of checked equipment, snorkeling is relatively safe since it done without the complicated equipment and training required for scuba diving.