págs. 2-4
Finding a Cosmic Yardstick: Henrietta Swan Leavitt's painstaking observations inspired a new way to determine the distances to far-off celestial objects.
págs. 14-17
From Gravedigger to Assassin: How the habits of one species of burying beetle have changed.
págs. 18-19
Bodies in Sync: The contagiousness of laughther, yawns, and moods offers insight into the origins of empathy.
págs. 20-25
The search for evidence of mass extinction: A quarter of a billion years old the "Great Dying" changed earth's ecological rules. Do current global events signal a similar revolution?.
págs. 26-32
págs. 36-37
Dune buggies: What is the sound of one katydid stridulating?.
págs. 38-39
pág. 48
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