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.
It is fascinating to note that humans can hold their breath for twice as long underwater as they can on land with their mouth and nose closed (the record stands at around ten minutes). The reason for this is that mammals, includings humans, have developed a reflex to conserve oxygen while underwater.