Secrets of the Dead.

Secrets of the Dead

The First Circle of Stonehenge

An archaeological quest reveals the oldest stones of Stonehenge originally belonged to an earlier sacred site -- a stone circle built on a remote hillside in west Wales. (60 minutes)

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Sun, 2/25 at 2:00 am on Austin PBS HDTV

Leonardo, The Man Who Saved Science

New evidence suggests that many of Leonardo da Vinci's ideas can be traced to other scientists, as far back as 1,700 years. (60 minutes)