Artist concept of Gravity Probe B orbiting the Earth to measure space-time, a four-dimensional description of the universe including height, width, length, and time.
(NASA)
The gravitational field can affect space and time: the stronger gravity is, the slower time moves. This prediction of General Relativity can be used to reveal hidden forces acting on dark matter.
The same amino acid can be encoded by anywhere from one to six different strings of letters in the genetic code.
Andrzej Wojcicki/Science Photo Library via Getty Images
Many of the amino acids that make up proteins are encoded by genetic material in more than one way. An information theorist explains how principles of nature may account for this variance.
One mathematical constant describes the population growth rate of a bunch of rabbits.
Supalerk Laipawat/EyeEm via Getty Images