Feature

Blonde, Nordic Mothers Are Likeliest to Have Twins

Dogs Recognize Words by Their Sound Alone

Citric, the Acid of Lemons, Found Now in Tobacco

Need Negative Proton to Explain Spin of Atom Nucleus

No Crop Shortage in Northwestern Tree Seeds

21,000 Photographs Help Measure Energy of Atoms

[Photograph]: Airplane Noise Analyzed during Fight

Oklahoma’s Mound Builders Wore Fancy Stone Earrings

United States Has No Monopoly of Misfortune

Government Now Honors Science on Postage Stamps

Drought-Resistant Grasses for West Sought in Asia

Department of Agriculture Will Not Slacken Research