Feature

Notched Bone Apparently Heidelberg Man’s Tool

Cancer to Be Studied with Use of New Heaviest Water

Molecules Packed on End in Best Lubricating Oil

Darwin’s Route Followed; Strange Animals Studied

Growth Spurt Made When Right Height Reached

Rare White-Shouldered Bat Acquired by Museum

Front Matter

Child’s Growth in Capacity Precedes His Achievements

April Evening Skies

Glass for Largest Telescope Disk Begins 10-Month Cooling

[Photograph]: Ninefold Easter Greetings

In Science Fields