In this issue:
"Your Inner Healers": Reprogramming cells could give them the therapeutic power of embryonic stem cells, without the political controversy.
"Revolutionary Rail": New investments may finally bring high-speed trains to the U.S.
"Uncanny Sight in the Blind": An extraordinary ability that enables some blind people to react to emotions on faces and even navigate around obstacles.
"Breeding Cassava to Feed the Poor": One of world's largest sources of calories has the potential to alleviate malnutrition in much of the developing world.
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