Feature

Decay May Split Comets, Not Nearness to Sun

Spinning Space Net Designed for Reentry

‘Dry’ Wells Yield Vast New Oil Supplies

Apollo Fuel Cell Part Approved for Space Use

Front Matter

In Future, Electricity May Come from Sewage

Current U.S. Patents

[Photograph]: Inside a Mammoth Motor

Classroom ‘Games’ Seen Sparking Enthusiasm

Allergies Plague 19 Million

Nature Note

[Photograph]: Mock Landing