p.7

Recycling glass does not degrade it, and manufacturing it can be carbon-free. So why are many countries still burying glass in the ground?

doi: 10.1038/d41586-021-02992-8

p.8

The pan-African science academy is in turmoil. Funders and fellows must jointly own the crisis, and work to stop it happening again.

doi: 10.1038/d41586-021-02991-9

p.15

doi: 10.1038/d41586-021-02815-w

p.18

As the US Food and Drug Administration authorizes shots for children aged 5 to 11, researchers predict what this might mean for populations.

doi: 10.1038/d41586-021-02947-z

p.19

The genomes of 13 remarkably preserved 4,000-year-old mummies from the Tarim Basin suggest they weren’t migrants who brought technology from the west, as previously supposed.

doi: 10.1038/d41586-021-02948-y

p.20

Radio signal seemed to originate from the star Proxima Centauri, and provided a helpful drill for future searches.

doi: 10.1038/d41586-021-02931-7

p.22

doi: 10.1038/d41586-021-02990-w

p.25

doi: 10.1038/d41586-021-02995-5

p.33

Reaching a deeper understanding of the ocean ecosystems that maintain whales might aid conservation efforts. Measurements of the animals’ krill intake indicate that previous figures were substantial underestimates.

doi: 10.1038/d41586-021-02951-3

p.34

Optimizing the testing of incoming travellers for COVID-19 involves predicting those who are most likely to test positive. A machine-learning algorithm for targeted testing has been implemented at the Greek border.

doi: 10.1038/d41586-021-02556-w

p.36

Entering your personal identification number using the keypad of a cash machine is notoriously insecure. A clever application of the special theory of relativity could make identification safer.

doi: 10.1038/d41586-021-02950-4

p.37

In mice, the ovarian hormone oestradiol sensitizes neurons in a brain region called the hypothalamus to a melanocortin hormone that signals an energy surplus. Their dual activation increases physical activity.

doi: 10.1038/d41586-021-02725-x

p.39

Efforts to generate nanoscale-resolution images of cell interiors have gained ground through the development and refinement of a microscopy method. The data sets are publicly available as resources for further discoveries.

doi: 10.1038/d41586-021-02776-0

p.41

doi: 10.1038/s41586-021-04008-x

p.47

doi: 10.1038/s41586-021-03998-y

p.51

doi: 10.1038/s41586-021-03915-3

p.57

doi: 10.1038/s41586-021-03940-2

p.62

doi: 10.1038/s41586-021-03918-0

p.67

doi: 10.1038/s41586-021-03942-0

p.74

doi: 10.1038/s41586-021-03919-z

p.80

doi: 10.1038/s41586-021-03932-2

p.85

doi: 10.1038/s41586-021-03991-5

p.91

doi: 10.1038/s41586-021-04043-8

p.96

doi: 10.1038/s41586-021-03956-8

p.102

doi: 10.1038/s41586-021-03960-y

p.108

doi: 10.1038/s41586-021-04014-z

p.114

doi: 10.1038/s41586-021-03944-y

p.120

doi: 10.1038/s41586-021-03986-2

p.125

doi: 10.1038/s41586-021-04006-z

p.131

doi: 10.1038/s41586-021-04010-3

p.136

doi: 10.1038/s41586-021-04025-w

p.141

doi: 10.1038/s41586-021-03977-3

p.147

doi: 10.1038/s41586-021-03992-4

p.152

doi: 10.1038/s41586-021-03982-6

p.158

doi: 10.1038/s41586-021-03935-z