The Scientist - USA (2022 - Spring)

(Maropa) #1

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20 THE SCIENTIST | the-scientist.com


that are trying to determine what birds can
smell, what kinds of cues are they paying
attention to, what can they discriminate
among.” Wilson-Rankin’s and Celis-Diez’s
recent studies, neither of which Iwaniuk
contributed to, are “two nice examples of
that,” he adds.
Iwaniuk suspects that many birds are
very sensitive to a small number of smells.
“You could have an olfactory bulb that’s
extremely small, but it’s really sensitive
to a select number of or a select range
of odors.” Wilson-Rankin agrees. In her
work on hummingbirds, “we built on the
work of others that found that just because
you don’t have a lot of [olfactory] neurons
doesn’t mean your sense of smell isn’t
important in certain contexts.”
—Jef Akst

Undead Fungus
Lily Peck entered the cryogenic freezer,
clad in a face shield and thick gloves for
protection against the dry ice, while a col-
league watched the door to ensure it didn’t
lock. The carbon dioxide and water vapor
rose in clouds around her, she recalls in
an interview with The Scientist, as she
reached for the rack with the preserved
fungal strains, careful not to burn her
skin on the icy trays. Stored in glass vials,
these sinister strains once presented a
deadly threat to coffee and other impor-
tant crop plants, but had been dormant in
this freezer for as long as 50 years. Peck, a
grad student at Imperial College London,
was here to awaken them.
The Centre for Agriculture and Bio-
sciences International (CABI), where the
cryogenic freezer is located, has what
Peck describes as a “fungal museum.”
This collection of around 30,000 strains
of living microorganisms, spread out
through extremely cold freezers like the
one Peck had entered and low-humidity
preservation rooms, offers scientists the DAVID RANKIN; ANDRZEJ KRAUZE

SWEET SCENTS: A male Anna’s hummingbird
(Calypte anna) on a feeder

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