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![Looking through this iceberg's reflection in the Antarctic water, you can see the iceberg below the surface—some 90% of its total volume.](/sites/default/files/styles/3_2_small/public/2023-11/iceberg.jpg.webp?itok=ETprs4Vs)
overview
The Arctic and The Antarctic
Travel to the ends of the earth—literally—and discover the polar ocean basins.......![The head of one bottlenose dolphin and the fin of another are visible above turquoise water in the Potomac River](/sites/default/files/styles/3_2_large/public/2023-11/Dolphin_image_1.JPG.webp?itok=PZ27We-s)
Article
A Dive into Dolphin Data: The History of Bottlenose Dolphins in the Potomac River
Dolphins may seem like unlikely visitors to the Potomac River, an urban waterway......
October 2023
![a veterinarian listens to a dolphin's heartbeat](/sites/default/files/styles/3_2_small/public/2023-11/Cynthia-Smith-NMMF.jpg.webp?itok=r3NpDMsZ)
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Heart Check Up
Cynthia Smith listens to a free-ranging dolphin's heart. Monitoring a dolphin's......![a veterinarian listens to a dolphin's heartbeat](/sites/default/files/styles/3_2_large/public/2023-11/Cynthia-Smith-NMMF.jpg.webp?itok=HmRId-E7)
Article
The Musical Hearts of Dolphins
For Dr. Cynthia Smith, listening to hearts is part of the job. Her patients just......
September 2020
![Photo of vaquita at the water’s surface with its face plainly visible.](/sites/default/files/styles/3_2_small/public/2023-11/Vaquita6_Olson_NOAA.jpg.webp?itok=2UkV3rDQ)
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Vaquitas at the Water's Surface
Governments and environmental organizations continue to monitor the vaquita......![A map showing different refuge and conservation areas.](/sites/default/files/styles/3_2_small/public/2023-11/VaquiteRange.jpg.webp?itok=egXKYRl9)
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Vaquita Refuge
Eliminating gillnets is key to protecting the vaquita from extinction. This map......![Photo of a man holding totoaba a vaquita caught in a net underneath.](/sites/default/files/styles/3_2_small/public/2023-11/Man-Totoaba-Vaquita__Omar_Vidal.jpg.webp?itok=0dFXwZvQ)
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Vaquitas as Bycatch
Gillnets used to catch totoaba accidentally catch vaquitas too. The vaquita’s......![A graph showing the population decline of vaquitas from 1997 to 2019. In 1997, there were 567 vaquitas. In 2012, there were 200. By 2014 there were fewer than 100, and by 2019 there was an estimated 6 to 9 vaquitas left.](/sites/default/files/styles/3_2_small/public/2023-11/SOH-4_Population_Graph.jpg.webp?itok=WDjEZV_4)
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A Population in Decline
At the current rate of population decline, the vaquita may be extinct in a few......![Map showing vaquita range in the Gulf of California with inset showing the Western Hemisphere and equator.](/sites/default/files/styles/3_2_small/public/2023-11/Vaquita_range_jpg.jpg.webp?itok=SHNDtNQh)
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A Small Range
Vaquitas live in an area smaller than ¼ the size of metropolitan Los Angeles.......![A vaquita pops its head out of the water.](/sites/default/files/styles/3_2_small/public/2023-11/Copia_de_Vaquita_swim_fast2_Jonas_Teilmann_%281%29_2.JPG.webp?itok=Rk1Qb9Ql)
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