A recent study indicates that natural variability may have been the cause for the ice in the Arctic to melt faster.
Biologist who sighted Allonautilus, a rare species of nautilus in 1984, spotted it again this July.
Varvara the whale nearly swam 14,000 miles from Russia to Mexico and back in just under six months.
Two studies suggested that warm waters, not caused by climate change or global warming.
