Volume 587 Issue 7834



News Features

News & Views

Universal assembly instructions for the placenta p.370

Our understanding of how mammalian embryos develop is based largely on mice. A study now reveals striking similarities and intriguing differences between mouse, cow and human embryos.

doi: 10.1038/d41586-020-02914-0

Hierarchies defined through human mobility p.372

An analysis of worldwide data finds that human mobility has a hierarchical structure. A proposed model that accounts for such hierarchies reproduces differences in mobility behaviour across genders and levels of urbanization.

doi: 10.1038/d41586-020-03197-1

Identifying gut microbes that affect human health p.373

When determining whether gut microbes affect human health, it is hard to distinguish between a causal and a correlative relationship. Analysis of microbial links to human traits and habits correlated with disease offers a step forward.

doi: 10.1038/d41586-020-03069-8

Interferon deficiency can lead to severe COVID p.374

Understanding what contributes to the development of severe COVID-19 would be of great clinical benefit. Analysis of people in whom this occurred pinpoints a key role for the signalling pathway mediated by type I interferon proteins.

doi: 10.1038/d41586-020-03070-1