Pennsylvania State University

Probing Question: What causes deja vu?

If you've ever had that fleeting, mysterious sense that something new -- a city or person you’re seeing for the first time -- is somehow familiar, that you’ve been there or known them before, then you can count yourself ...

dateFeb 12, 2010 in Psychology & Psychiatry
shares2 comments 32

Probing Question: Are we running out of helium?

Party planners, take note: the atmosphere may become a little deflated at gala events in the future. Some scientists are sounding the alarm about the wastefulness of using helium—a rare, non-renewable gas—to fill party ...

dateApr 26, 2013 in Earth Sciences
shares1 comments 11