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
KA
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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”