About 445 million years ago, Earth’s oceans turned into a danger zone. Glaciers spread across the supercontinent Gondwana, ...

A massive ice age wiped out ocean life 445 million years ago, reshaping ecosystems and setting the stage for jawed fish ...

About 445 million years ago, Earth nearly wiped out life in the oceans. Glaciers spread across the supercontinent Gondwana, ...

Learn how microscopic fossils reveal that tiny seafloor organisms were already feeding and recycling nutrients soon after one ...

Imagine if scientists could reach back through time and recover the genetic blueprints of species that vanished thousands of years ago, then use those ancient instructions to rebuild lost traits in ...

On vacation, you're free to follow your heart.

Ancient sloths ranged in size from tiny climbers to ground-dwelling giants. Now, researchers report this body size diversity was largely shaped by sloths’ habitats, and that these animals’ precipitous ...

pt. 1. Beyond the mainland ; 1. Introduction ; 2. History of island studies ; 3. Factors that influence island faunas. Types of islands. Dispersals to islands. The candidate species. Composition of ...

Speciation and extinction are the twin engines that have sculpted the diversity of life on Earth. Speciation, the process by which new species arise from ancestral populations, is driven by a mixture ...

The past as prologue -- Adaptation -- Origin of species -- Human evolution -- Living fossils -- Extinction -- Macroevolution -- Epilogue, old and new pictures https ...