Seals are great swimmers, which makes them a great candidate for collecting ocean data.
Dan Costa
In some of the most remote places on Earth, tags attached to seals collect data at the cutting edge of ocean science.
Female elephant seals take seven-month feeding trips during which they balance danger, starvation and exhaustion.
Dan Costa
By measuring how and when elephant seals sleep, researchers were able to figure out how elephant seals change their risk-taking behavior as they gain weight.
Workmen dissecting a whale carcass in Antarctica, circa 1935.
Hulton Archive via Getty Images
For 200 years, a small number of countries have exploited the marine wildlife of Antarctica, often with devastating impact on their populations.