New Scientist - USA (2020-07-25)

25 July 2020 | New Scientist | 1

On the

cover

11 The evidence

for face masks

14 Alzheimer’s in the gut

9 How Australia lost

control of covid-

36 The return of

analogue computing

12 A new push for Mars

News

Views

Features

7 Vaccine hope

Oxford trial delivers promising

immune response

14 Alzheimer’s in the gut

Protein linked to the condition

may not start in the brain

15 Universal mystery

Astronomers can’t agree

on how fast the cosmos

is growing

21 The columnist

The sudden end of normal

activity is helping rewilding

efforts, says Graham Lawton

22 Letters

Nowhere responded to

covid-19 quickly enough

24 Culture

A dystopia without lessons

for the modern world

25 Culture

What happens when a

pandemic wipes out men?

28 Aperture

Ethereal shots of our universe

53 Puzzles

Cryptic crossword and the quiz

54 More puzzles

A stripy flag, a pair of scissors

and a problem to solve

54 Cartoons

Life through the lens of

Tom Gauld and Twisteddoodles

55 Feedback

Social distancing with

Australia’s deadly fauna

56 The last word

Why don’t trees get really

wide? Readers respond

30 99% of what we eat

is a mystery

There’s a giant hole in our

knowledge of what is in our food

36 Analogue comeback

Why digital technology is

getting a helping hand

42 Feeling the heat

Climate scientist Friedrike

Otto on what causes

extreme weather

The back pages

16 Obesity and the pandemic We still don’t know the best way to get slim

Vol 247 No 3292

Cover image: HAVET/Getty Images

30 99% of what we

eat is a mystery

The emerging science of

nutritional dark matter

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Insight

18 Campfires on the sun

24 Brave New World: The TV show

19 How sea turtles get lost

This week’s issue

42 Features

“ Wherever

you live,

there is

damage from

extreme

weather

caused by

climate

change”