Dear Kitty. Some blog

This 25 November 2019 video from the USA says about itself:

Stanford researchers report first recording of blue whale heart rate.

From Stanford University in the USA:

First recording of a blue whale’s heart rate

November 25, 2019

Summary: With a lot of ingenuity and a little luck, researchers monitored the heart rate of a blue whale in the wild. The measurement suggests that blue whale hearts are operating at extremes — and may limit the whale’s size.

Encased in a neon orange plastic shell, a collection of electronic sensors bobbed along the surface of the Monterey Bay, waiting to be retrieved by Stanford University researchers. A lunchbox-sized speck in the vast waters, it held cargo of outsized importance: the first-ever recording of a blue whale‘s heart rate.

This device was fresh off a daylong ride on Earth’s largest species — a blue whale. Four suction cups had secured…

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