Einstein introduced the cosmological constant to his equations of general relativity because he believed the universe was static. Faced with evidence that the universe was actually expanding, however, ...

When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. The problem with string theory, according to some physicists, is that it makes too many universes ...

String theory's equations give rise to a near infinite variety of potential universes in a 'landscape.' This landscape is surrounded by a 'swampland' of solutions that are incompatible with any ...

String theory has long been presented as physicists' best candidate for describing the fundamental nature of the Universe. Yet, at the beginning of the 21st century, it became apparent that most ...

After 60 years, this beautiful theory hasn't produced many tangible results. When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. Paul M. Sutter is an ...

For almost a century physics has been fractured. On one side of the fault line lies Einstein's theory of general relativity, which posits that gravity results from massive objects bending space and ...

When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. The problem with string theory, according to some physicists, is that it makes too many universes ...

If you enjoyed this article, I’d like to ask for your support. Scientific American has served as an advocate for science and industry for 180 years, and right now may be the most critical moment in ...