How Effective Are Sunscreens?

In 2007, a fascinating article was published in the New York Times that addressed whether using sunscreen in fact helps to prevent skin damage. Some points that I find to be interesting are how many doctors feel that using an SPF to measure sunscreen strength is a "terrible system," and how it is common for sunscreens to be misleading to consumers. Enjoy!

Starting with the big picture

How many people were born today?  How much oil was pumped out of the ground today?  How many emails have been sent today?
Check out Worldometers to see a thought-provoking collection of stats, all changing in real time.
Which is your favorite?