Contrails have a simple explanation, but not everyone wants to believe it. AP Photo/Carolyn Kaster Calum Lister Matheson, University of Pittsburgh Online influencers with millions of followers have ...

The human ecosystem is made of open and closed systems. While the earth is a closed system for matter but an open system for energy, the human body is considered an open system. There is a growing ...

THE first edition of this book was reviewed at some length in the issue of NATURE for March 18, 1909 (vol. lxxx., p. 64). The additions made to the present edition are incorporated in an appendix of ...

String theory began over 50 years ago as a way to understand the strong nuclear force. Since then, it’s grown to become a theory of everything, capable of explaining the nature of every particle, ...

From Quanta Magazine (find original story here). Why does life exist? Popular hypotheses credit a primordial soup, a bolt of lightning and a colossal stroke of luck. But if a provocative new theory is ...

The mother of all string theories passes a litmus test that, so far, no other candidate theory of quantum gravity has been able to match. It’s not easy being a “theory of everything.” A TOE has the ...