The solution to too much sitting is simple but hard to stick with. This walking challenge sets you up for success, with six tips to keep you moving throughout your day.
Young, infected Lasius neglectus ants will send out an altruistic "kill me" signal to worker ants, a new study finds, as part of a strategy to keep deadly pathogens from spreading through the colony.
(Image credit: Christopher D. Pull)
Crude prices are low. Companies are being cautious. But huge reserves — particularly of the heavy, viscous oil Venezuela has in abundance — remain appealing.
(Image credit: Pedro Mattey)