4 DISCOVERMAGAZINE.COM
ON THE COVER
Apollo at 50: To the Moon
and Back p.
Digital Detox: A Smartphone
Addict’s Test p.
Buried at Sea: Prehistoric Sites
Rise Again p.
Dragonglass: Not Just the
Stuff of Fantasy p.
Cover credit:
Neil Armstrong/NASACONTENTS
COLUMNS & DEPARTMENTS
54
9 THE CRUX
An unusual worm
has a sticky solution
to attacking prey;
an academic
dust-up over what
may be the world’s
oldest fossils;
the eerie beauty
of a toxic algal
bloom; the global
traffic patterns of
human migration;
the high cost of
health care; plus
our top picks for
your summer
reading list.Return to
Aquaterra
Sea levels were lower for
95 percent of our prehistory.
Today’s oceans may be hiding
archaeological sites that could
upend what we know about
our species. BY GEMMA TARLACH6 EDITOR’S NOTE
Keep Dreaming
Curiosity and the desire
to explore have always
been in our DNA.
22 VITAL SIGNS
Connect the Dots
A woman’s sudden mania,
furious note-taking and
other strange behaviors
leave her doctors in the
dark. BY ELIEZER J. STERNBERG26 ORIGIN STORY
The Real
Dragonglass
More than a prop for the
hit series Game of Thrones,
obsidian plays a unique
role in archaeology.
BY GEMMA TARLACH64 MIND OVER MATTER
Digital Detox
A writer discovers how
dependent she is on her
mobile devices — and what
happens when she ditches
them. BY AMY PATUREL68 OUT THERE
Protecting Mars
From... Ourselves
As human exploration of the
Red Planet increases, is it
time to rethink stringent rules
about keeping it clean?
BY NOL A TAY LOR RED74 20 THINGS YOU
DIDN’T KNOW ABOUT ...Feet
Have you heard of the
International Foot? It
turns 60 in July. We take its
measure, and much more.
BY GEMMA TARLACHCLOCKWISEFROMTOP:^DEEPTIMEMAPS;^SUTTHABURAWONK/SHUTTERSTOCK;^LOCKHEEDMARTIN;^ HELENSLOAN/HBO