Table of Contents

Random Walk

Diving for Microbes
by Marcus Y. Woo
A mysterious medley of microbes thrives in the harsh conditions of the ocean floor by eating methane. Turns out they're more important to the planet than you might think.

The Arrow of Time
by Sean Carroll
Why do we remember the past and not the future?

The Light and Sound Fantastic
by Douglas L. Smith
Trapping coherent light on a microchip is old hat-LED lasers underpin our high-tech world. Now a chip-compatible component developed at Caltech also traps coherent sound. Who knows where a marriage of the two might lead?

Obituaries: Andrew Lange, Lew Allen Jr., James K. Knowles, F. Brock Fuller