Scale invariance, the absence of fundamental length or mass scales in a theory’s action, plays a pivotal rˆole in modern cosmology. In global formulations it serves as a custodial symmetry that ...

Rome is famous for its huge flocks of starlings that swerve through the evening sky as if directed by a collective intelligence. While these spectacular displays have fascinated Romans since ancient ...

Breathe. As your lungs expand, air fills 500 million tiny alveoli, each a fraction of a millimeter across. As you exhale, these millions of tiny breaths merge effortlessly through larger and larger ...