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Landsat records show the world's mangroves lost nearly 3,000 square kilometers from 1984 to 2010, then gained nearly 2,000 after 2010. About two-thirds of the new forest spread onto fresh mudflats and warmer coasts on its own.

A study found a record number of eastern Pacific leatherback nests on Ecuadorian beaches in 2025-2026, about 1,600 km south of the usual grounds in Mexico and Costa Rica, with hatch rates to match. One tagged female, Bella, saw 134 of her 146 eggs hatch.

Genome data from 11 of the 13 recognised howler species revealed two new ones in the Amazon, the first described since 1941. One of them, the Mato Grosso red howler, lives in the Arc of Deforestation, and its describers expect it to qualify as Critically Endangered.

In a 659-patient phase 3 trial, both doses of Cloudbreak Pharma's CBT-001 eye drops eased redness and limited growth of pterygium, an eye condition only surgery can remove. Here is what the company's topline data show, what the drops cost in side effects, and why independent review still matters.

A study of every bird and mammal species that fell below 50 wild animals since 1950 found that 61% of those given direct conservation help recovered to at least 100. Here is what the help looked like, how one island bird came back from about 23, and what the study cannot prove.

The FDA gave tentative approval to a generic twice-yearly HIV prevention shot that will cost $40 per person per year in 120 countries, about 16 months after the brand-name version was approved. Here is what the trials show, how the timeline shrank, and what still stands between approval and patients.