Feature

Sagan and Velikovsky

Speaking of Ethology

Human Behavior: Do Animals Have the Answer

Front Matter

Krebs Cycle and the Primordial Soup

New Products

Streaking through the Universe

Stars: Five Bright Stars, Two Planets Dominate in May Sky

Solar Neutrinos: Change the Theory

Flare on the Sun: A Whole New Class

The Oil That Wasn’t There

Tumors by Virgin Birth