measured in hertz (hz). humans and animals create different pitches of sound by varying the length of the wave as they produce the sound. the frequency range that humans can detect with their ear is between - hz while other animals can detect other ranges. the range of - hz, which is below the range...
the same route in a remote corner of northern france, three farm fields intersect. on a cold morning in mid-april, the crops that border a narrow crossing of rough-hewed cobblestoned paths barely reach ankle high. but three pop-up bars are doing a brisk cash-only business, and it's clear that some of...
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feeding strategy. in the fall pacific humpbacks are readying for their winter migration to hawaii. from our camp you'll see them lunge feeding – breaking to the surface with open mouths, the water sluicing out and hundreds of krill staying in. you can watch them feed all day, because it takes a lot...