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underwater shipwreck

BAT SIGNALS  The U.S. Navy uses sonar to image underwater objects and obstacles, such as this shipwreck in Narragansett Bay in Rhode Island. Taking inspiration from bats, naval researchers hope to get sharper images with smaller, cheaper sonar equipment.

hurricane Irma

IRMA INCOMING  Hurricane Irma passed by Cuba on September 8, 2017, as a Category 4 storm (seen in this geocolor image captured by NOAA’s GOES-16 satellite) before making landfall in the Florida Keys on September 10, 2017.

Epipedobates anthonyi

SMALL BUT DEADLY  The potent toxin epibatidine was first discovered in 1974, when it was isolated from the skin of the phantasmal poison frog, Epipedobates anthonyi (one shown).

PET scans

TANGLED The brain of a person with Alzheimer’s disease symptoms (right) is laden with tau protein (red), while a person with no symptoms (left) has little tau.



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