Feature

Nature Ramblings: Dormant Butterflies

Gorgeous Caves of Loltun Invite Further Exploration in Yucatan

Notebook of Science

Seek to Prove That Americans Came from Asia

Names of Days Unchanged since Romans Ruled Rhine

Leprosy Is Being Attacked by Chemical Warfare

Waste Natural Gas Used to Increase Oil Well Yield

Ancient American Inventions

Guayule Produces Rubber Only When Its Life Is Hard

Given Airplane, Ancestors of Lindbergh Would Have Flown

In Science Fields

Kepler’s Memory Honored at Tercentenary of Death