Vitamin D deficiencies have long been a concern in high latitudes because sunlight — which stimulates its production in the body — is scarce in winter months.

Walruses were found washed up on the beaches from Cape Espenberg to Shishmaref and further west. Samples taken from the intestines of four walrus all had moderate to high levels of saxitoxin.

Guided Sea Kayak Tours & Eco-Resort Accommodation in Desolation Sound, British Columbia, Canada. Take the tour of a lifetime!

Shorter periods of sea ice on Hudson Bay as a result of climate change translate into fewer polar bears in Churchill region.

Tissue from the recent necropsy on a humpback whale remains on Kincaid beach

130 dead seals washed up in Russia's Lake Baikal, and scientists have taken lake water samples and biopsies of the animals. Preliminary theories about the die-off did not suggest pollution is the reason.

Scientists studying dolphins dining off the California coastline have found that the marine food web is starting to look a little threadbare. The length of food chains in that web appears to have gotten shorter in response to environmental changes — such as those caused by El Niño events.

Around 20 bears have surrounded Ryrkaypiy attracted by the walruses that recently appeared at a special protected area. Several hundred frightened walrus fell to their deaths and the polar bears then ate the carcasses.

'Attention!!! Huge polar bear up running after birds behind Tasilik street!!!' Christine Boucher-Wight posted on the Iqaluit Public Service Announcement Facebook page.

Zoom in on this supposed image of sheep on a hillside and you'll be in for quite the surprise.

The extraordinary sight of a 30-foot long dead humpback whale that washed up on a beach area in Anchorage.

California sea lions are rare but occasionally show up in Southeast Alaska and have been documented in other parts of Alaska as well.

It's not yet clear what led to the humpback’s death or where it died, and biologists are warning people to stay away from the carcass.

Dozens of walruses were found dead earlier this month at their seasonal haulout near Point Lay. The findings came just about a day after locals said they saw an airplane they believed to be flying inappropriately over the herd, which comes to shore each year once the sea ice recedes past the continental shelf and it becomes too deep for them to feed.

Scientists are at a loss to explain one of the biggest mysteries surrounding the critically endangered North Atlantic right whale.

The Arctic barrier island where the carcasses were found has emerged as a favored end-of-summer haulout for animals trying to survive without summer sea ice.

Unidentified sea mammal bones later identified as beluga whale.

Several hundred Pacific walruses have started to gather on an island off the northwest coast of Alaska — the earliest the animals have been observed leaving the water for the annual ritual, according to federal wildlife officials.

Hundreds of Pacific walruses came ashore to a barrier island on Alaska's northwest coast, the earliest appearance of the animals in a phenomenon tied to climate warming and diminished Arctic Ocean sea ice.