In this issue:
"The Pyramid Effect": The construction of Egypt's most famous monument spawned a social organization that changed the world.
"Seeing in the Dark": The ambitious new Dark Energy Survey aims to solve the riddle of why space is expanding at an ever faster pace.
"Disease Detector": Tiny new probes can diagnose infections in 20 minutes, knocking days off the wait for results and saving lives.
"The Battle of Olives": Mistrust among growers and scientists may threaten Italy's olive groves more than the nasty bacterium they are fighting.