For a century, Brazil's Catholic Church has sent holy statues out to parishioners' homes. A new study finds that these visits create a local subeconomy, benefitting families and the church.
The online game of geocaching shows there are ways to create value online that are not purely financial.
Over the last 20 years, advances in the field of exoplanet discovery have excited the imaginations of scientists and enthusiasts alike. But we're in position to know yet whether a planet is habitable.