Slowly retiring chimps, tanning at the cellular level, and plumbing magma’s secrets

Summary: This week we have stories on why it’s taking so long for research chimps to retire, boosting melanin for a sun-free tan, and tracking a mouse trail to find liars online with Online News Editor David Grimm. Sarah Crespi talks to Allison Rubin about what we can learn from zircon crystals outside of a volcano about how long hot magma hangs out under a volcano. Listen to previous podcasts. [Image: Project Chimps; Music: Jeffrey Cook]