An expedition searching for a rare Yangtze River dolphin ended Wednesday without a single sighting and with the team's leader saying one of the world's oldest species was effectively extinct. The ...

There are around 40 species of dolphins alive today. They are found all over the world and live in both freshwater and marine habitats. However, although many species are thriving with populations in ...

More than 99% of all species that have ever lived are now extinct - and today, many scientists believe we are driving a sixth mass extinction. From the baiji dolphin of China’s Yangtze River to the ...