Emperor penguin heart rates rise to 250 bpm right before a dive and drop to 6 bpm as they dive 1000 ft underwater for 20 minutes. But they have similar resting heart rates as humans. (Scuba humans only dive about 130 ft in comparison.) https://t.co/uGfQUQQxHk

— Ō’m”kaistaaw”kaa•kii (@mariahgladstone) January 29, 2020