Plants repeatedly got rid of their ability to obtain their own nitrogen

Enlarge / Plants. (credit: James Petts / Flickr) Plants, like all living things, need nitrogen to build amino acids and other essential biomolecules. Although nitrogen is the most abundant element in air, the molecular form of nitrogen found there is largely unreactive. To become useful to plants, that nitrogen must first be “fixed,” or busted […]

Avengers 4: Captain America travels back in time to obtain the Soul Stone from [SPOILER]?

WARNING SPOILER FOR AVENGERS INFINITY WAR AHEAD The Avengers are seriously screwed. At the end of Infinity War, Thanos, the villain won and half the universe died – included a ton of the superheroes. So what do they do now? Well Marvel‘s Avengers 4 set photos have suggested some sort of time travel or multi-verse […]