Preserved tracks in Alaska park suggest duck-billed dinosaurs lived in Arctic year-round
Geologist says Curiosity's images show Earth-like soils on Mars
Soil deep in a crater dating to some 3.7 billion years ago contains evidence that Mars was once much warmer and wetter, says University of Oregon geologist Gregory Retallack, based on images and data captured ...
New study: Ancient Arctic sharks tolerated brackish water 50 million years ago
Sharks were a tolerant bunch some 50 million years ago, cruising an Arctic Ocean that contained about the same percentage of freshwater as Louisiana's Lake Ponchatrain does today, says a new study involving ...
Shark teeth analysis provides detailed new look at Arctic climate change
A new study shows that some shark species may be able to cope with the decreasing salinity of Arctic waters that may come with rising temperatures.