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1. 

   To Study the Mayas by Living with Them

   By Science NewsJanuary 24, 1931

2. 

   Eros: Asteroid 433: “A Classic of Science”

   By Science NewsJanuary 24, 1931

3. 

   Earth’s Core Was the Child of Two Great Flaming Suns

   By Science NewsJanuary 24, 1931

4. 

   Carnegie Scientists Inspect Maya Ruins

   By Science NewsJanuary 24, 1931

5. 

   Congress May Pass Infant Welfare Bills

   By Science NewsJanuary 24, 1931

6. 

   Nature Ramblings: Luckless Rodents

   By Science NewsJanuary 24, 1931

7. 

   Invisible Radiations from Cells Are Detected by Yeast

   By Science NewsJanuary 24, 1931

8. 

   Two Elevators in One Shaft to Relieve Traffic

   By Science NewsJanuary 24, 1931

9. 

   First Glances at New Books

   By Science NewsJanuary 24, 1931

10. 

    Front Matter

    By Science NewsJanuary 17, 1931

11. 

    Spring-Built Molecule Models Simulate Vibration of Atoms

    By Science NewsJanuary 17, 1931

12. 

    An American Romance in Steel and Steam

    By Science NewsJanuary 17, 1931