New Scientist - USA (2021-02-13)

13 February 2021 | New Scientist | 1

On the

cover

36 Is it ever OK to eat fish?

The true toll of our enormous

appetite for seafood

19 Knotty problem

Breakthrough in

100-year-old maths puzzle

46 Avi Loeb on alien life

“We need to be more

open-minded”

News

Views

Features

12 Vaccine action

Once you have had a

coronavirus vaccine, how

do you know if it worked?

16 New Hope on Mars

A United Arab Emirates

spacecraft is on the way

18 Mothballed

Why the decline of butterfly

collecting is harming science

23 Comment

We need a clear picture of the

harms of gambling, say Naomi

Muggleton and Neil Stewart

24 The columnist

Graham Lawton on net zero’s

impact on climate pledges

26 Letters

Hunting for Dyson spheres

28 Aperture

A baby lemon shark hides

in a mangrove forest

32 Culture

It’s a Sin exposes the realities

of the early AIDS epidemic

51 Science of cooking

Make your own mayonnaise

52 Puzzles

Try our crossword, quick

quiz and logic puzzle

54 Almost the last word

Why do some people like

gambling so much?

56 Feedback

Spinach emails and large small

boulders: the week in weird

56 Twisteddoodles

for New Scientist

Picturing the lighter side of life

36 Is it OK to eat fish?

The world’s appetite for seafood

is exploding. It is time for a look

at whether that is sustainable

41 Learning to treat covid-

Changes in how we deal with

coronavirus cases are helping

many more people survive

46 Avi Loeb interview

The astrophysicist with an open

mind about alien spacecraft

The back pages

18 Ape communications Orangutans in captivity invent new gestures

Vol 249 No 3321

Cover image: Andrea de Santis

Coronavirus special

8 How to get the most out

of your jab – five things

you can do to boost how

well a vaccine works

14 The new vaccines

on the block

41 Why hospitals are saving

so many more lives

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News

21 Sperm rivalries 51  Science

of mayo 19  Ancient face cream

21  Fairy circles 18  Orangutans

invent new signals 16  Splat

chemistry 32  It’s a Sin, reviewed

This week’s issue

46 Features

“ All the

natural

explanations

suggested are

things we’ve

never seen

before”