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Back Matter

Front Matter

Organs Kept Alive in Tubes to Throw Light on Life

Listen for Shortwave Radio Signals from Milky Way

Most of Light in Night Sky Comes from Sun, Not Stars

New Tool of Science Is Itself Little Known

“Uncertainty Principle” Extended to Include Biology

Tablet Reveals Extent of Famous Xerxes’ Empire

Despite Leap Years, Calendar about Three Hours in Error

Medical Training Could Reduce Maternal Deathrate

Gland Extract Checks Growth but Speeds Growing-up