Erik Karlsson has finished his second season with the Pittsburgh Penguins and for the second straight year, he played well below his expectations. The three-time Norris Trophy winner joined the ...

Penguins are ubiquitous in zoos, aquariums, and countless films, often appearing familiar and easily understood. Yet, beneath this recognizable exterior lies a world of surprising complexity, ...

During northern winters, male emperor penguins incubate eggs while females travel to feed, then precisely time their return when male energy reserves are depleted. These cooperative behaviors ...