Feature

Fluorine in Water Causes Spotted Teeth

Incurable Tropical Disease Yielding to Science

Reversed Blood Flow Relieves Gangrene

Orchid Greenhouse Rotates to Catch Full Sunlight

Home of America’s Vestal Virgins

Bacteria-Eating Protozoa Thrive Best on Mixed Diet

In Science Fields

Magnetic Storms Most Frequent at Equinox

First Glances at New Books

Earth’s Magnets Quiver Day after Outburst on Sun

Front Matter

Cancer Kills More Quickly as Blood Alkalinity Rises