788K views · 10K reactions | Not getting in the path of gang members is only a part of the inmates daily lives. Cell searches, working to serve other inmates and family visits are also constant. | Free Documentary | Facebook

What secrets lie hidden at the very center of our planet? Could Earth’s inner core actually contain another, even deeper layer? Recent studies published in the Journal of Geophysical Research reveal evidence that may force us to rethink Earth’s structure. How was this discovery made, and what does it mean for the story of our planet’s history? Watch to uncover the mystery locked beneath our feet. | The Brain Maze