Heavy metals and chemicals pollute the sandy island off Nova Scotia that's home to wild ponies and seals — one of Canada's newest national parks.

China may not give an encore performance of its heavy metal show from Beijing at this summer's London Olympics, but there will be no shortage of stories as gymnastics prepares to take centre stage at The O2 Arena.

The deaths of nearly 900 dolphins and porpoises along Peru's coast earlier this year cannot be attributed to infections, pesticides, heavy metals or human intervention and remain unsolved, a government investigation has concluded.