The White Whale. 1  Belugas (Delphinapterus leucas) are one of the most recognizable and popular whales because of their white skin colour and âsmilingâ upturned mouth. They are extremely sociable mammals that live, hunt, and migrate together in pods, ranging from a few individuals to hundreds of whales.
Here's what these terms mean: 1  Pace: Your immediate pace in minutes per mile or kilometer. 2  Average Pace: Your cumulative average pace for your current session in minutes per mile or kilometer.
Average Half Marathon Pace by Age and Sex. The table below contains the average race pace for all ages by sex as calculated using 24,000+ Half Marathon runners in the US in 2010.verage Half Marathon Pace by Age and Sex. The table below contains the average race pace for all ages by sex as calculated using 24,000+ Half Marathon runners in the US in 2010.