Russia isn't the only nation suspected of training marine mammals for military use – the US, UK, and Ukraine have all done so in the past.
Protecting forests and wetlands, which absorb and store carbon, is one way to slow climate change. Scientists are proposing similar treatment for marine animals that help store carbon in the oceans.
Our flippered friends evolved from small, hooved deer-like creatures more than 50m years ago.
The pressure in the deepest part of the ocean can be 1,000 times greater than the pressure we experience at sea level – but creatures that live and visit there have some very special features.
New research shows how marine mammals ignore the rules of biology to thrive in the world's coldest waters
Climate change is shrinking Arctic sea ice and opening the region to ship traffic. Whales, seals and other marine mammals could be at risk unless nations adopt rules to protect them.
The only sea creature known to attack blue whales is the orca, also known as a 'killer whale'. But humans present a much bigger threat to them.
The noise from motor boats, sonar and other industrial activity interferes with the underwater chatter of fishes.
From the oil that makes your petrol, to car parts, to the groceries and other things in your weekly shop, retail consumerism is driving a boom in the amount of noise in the world's oceans.
Pond snails use things like rocks or the side of their aquarium as their bed, attaching themselves while they sleep. This might not seem very relaxing but their shells do hang away from their body.
An animal behaviour expert gives his view on finding that a killer whale can copy the sound 'hello'.
A new report will supply some information needed for science based conservation measures in the Red Sea.
Complex behaviour such as regional accents and cultural food preferences in whales and dolphins seems to be linked to brain size.
Fossils of a whale thought to be found only in southern waters have been discovered at two sites in the northern hemisphere.
Marine mammals are often referred to as sentinels of the ocean and research on whales and dolphins in particular contributes important knowledge about the health of our seas.
In this episode of Change Agents, Andrew Dodd speaks with Darren Kindleysides and Don Rothwell on how Australia won a case against Japan's whaling activities at the International Court of Justice.
Ancient whales were neither gentle, nor giants: they were smaller than those of today and judging from their teeth, a lot meaner.
A new study shows that the way humpback whales choose their habitats is affected by humans.
There are plenty of mammals that have adapted to life in water, some more than others. That meant they also had to adapt the way they feed.
More than 400 whales have died on a beach in New Zealand.