Depending on whether or not an invisibility cloak conjures up images of 'Harry Potter' or "Star Trek", we can tell a lot about you your age but as far back as H.G. Wells' turn-of-the-19th-century classic "The Invisible Man" people have been fascinated by the notion of invisibility.
In our many accolades of citizen science, nothing stands taller among discoveries than the strange object Hanny van Arkel found in archived images of the night sky in 2008.

After catching sight of it, courtesy of Hanny and Galaxy Zoo, astronomers were determined to learn more about Hanny's Voorwerp (Hanny's "object" in Dutch).    Now they say they have discovered that  Hanny's Voorwerp represents a 'snapshot in time' that reveals surprising clues about the life cycle of black holes.
1,400,000 70-dimension histogram vectors about gamer behavior.  What can you do with that?

Me?  Nothing, the math is too much but, if you can make sense of it, a lot of data is there in the ongoing online gaming phenomenon known as World of Warcraft(WoW).   Keeping track of all that data would seem to be solely the purview of computer programmers but sociologists are starting to take notice.   Some people are just goofing off and writing a book about their experiences but others see gold in 'game mining' - the insights of anthropology we can get by seeing what 10 million people do in a virtual, controlled setting over a period of years.
International Environmental law and Nuclear Winter

Nearly thirty years after its introduction in the 1980s, the Nuclear Winter hypothesis has gained additional quantitative confirmation, providing a robust argument for the illegality of nuclear weapons under the Law of Armed Conflict.
Like our own world history, the Universe had its own cycle of events.    After the initial Big Bang (though 'Bang' is a confusing word, it may have been rather dull), there were no light sources in the Universe.