Volume 591 Issue 7851



News Features

News & Views

First complete model of the human embryo p.531

Early in development, human embryos form a structure called the blastocyst. Two research groups have now generated human blastocyst-like structures from cells in a dish, providing a valuable model for advancing human embryology.

doi: 10.1038/d41586-021-00581-3

Atomic clocks compared with astounding accuracy p.534

Three atomic clocks based on different atoms have been compared with record accuracy. The findings bring a redefinition of the second a step closer and aid the search for dark matter — an elusive component of the Universe.

doi: 10.1038/d41586-021-00738-0

Mitochondria are mixed during cell division p.535

Organelles called mitochondria have essential roles in the cell and must be inherited successfully as it divides. It turns out that three types of interaction with filaments of actin protein mix and partition mitochondria during cell division.

doi: 10.1038/d41586-021-00511-3