For the U.S., Kerry is to sign the agreement Friday and then President Obama will ratify it before he leaves office in December, a senior U.S. official told CBS News in a conference call this week.
Time Frame. The average dolphin species can stay underwater for as long as eight to 10 minutes; some can remain submerged while holding their breath for 15 minutes. Dolphins breathe through their blowhole, which has a muscular flap that covers it when they go under water, keeping water out of their lungs. Size.
How the sperm whale can hold its breath for 90 minutes. Biologists have unravelled why deep diving mammals such as sperm whales can hold their breath for over an hour when diving for food â they have electrically charged proteins in their blood. Sperm whales make some of the longest dives achieved by mammals, with some lasting up to 90 minutes Photo: AP.