Replaying the tape of life: Is it possible?

A review published in the Nov. 9 issue of Science explores the complexity of evolution’s predictability in extraordinary detail. Jonathan Losos of Arts & Sciences takes on a classic question posed by Stephen Jay Gould in an effort to fully interrogate ideas about contingency’s role in evolution.
Parnell's mustached bat

Time travel with bat guano

A favorite Halloween symbol leaves behind clues to what a tropical landscape looked like thousands of years ago. With support from the Living Earth Collaborative, postdoctoral scholar Rachel Reid of Arts & Sciences digs in.
Jonathan Losos feature image

Sustaining life on Earth

In the midst of what scientists consider to be a sixth mass extinction event, Washington University is joining forces with the Missouri Botanical Garden and the Saint Louis Zoo to collaborate on ­life-saving research and conservation efforts.