-
© American Chemical Society (A Britannica Publishing Partner)How to increase alertness without caffeine, and the chemistry of why these methods work.
-
Contunico © ZDF Studios GmbH, MainzLearn the longevity secrets of the residents of Okinawa, Japan.
-
© MinuteEarth (A Britannica Publishing Partner)A survey of the largest known single living organisms on Earth, which includes representatives from the animal, plant, and fungal kingdoms.
-
Encyclopædia Britannica, Inc.Learn what defines an organism and consider two candidates for the title of world's smallest organism—the bacteria Carsonella ruddii and Mycoplasma genitalium.