Growing up, I never loved jewelry. But I’ve been wearing the same necklace for the past year: a wrapped lemon shark tooth ...

Rising Ocean Acidification Could Leave Sharks Toothless, and Scientists Say It’s Not Good News ...

In the 21st century, the Earth’s oceans are growing warmer and more acidic. This change is happening slowly over the long-term, but it can also cause short-term, local spikes. These events are like ...

PORTLAND, Maine (AP) — Sharks are the most feared predators in the sea, and their survival hinges on fearsome teeth that regrow throughout their lives. But changes in the ocean's chemistry could put ...

A new assessment finds that the world’s oceans crossed the safe threshold for acidification in 2020, breaching a key planetary boundary and posing serious threats to marine life. Ocean acidification ...

Scientists have known for decades that soaring atmospheric carbon dioxide emissions are causing changes in ocean chemistry, threatening marine life and ecosystems. In June 2025, a study found that ...

The levels of carbon dioxide and other greenhouse gases like methane and nitrous oxide have been steadily rising for many years due to a variety of human activities, like the burning of fossil fuels ...

This is read by an automated voice. Please report any issues or inconsistencies here. PORTLAND, Maine — Sharks are the most feared predators in the sea, and their survival hinges on fearsome teeth ...