ALL ABOUT WHALES!
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The half-life of a radioisotope is the amount of time it takes for half of the radioisotope to decay.
A harpoon is a long, spear-like weapon that was used by whalers to kill whales.
Herbivores are animals that eat plants. No whales are herbivores.
A herd is a group of whales (usually used for baleen whales), also known as a pod.
A heterotroph (or consumer) is a living thing that eats other living things to survive. It cannot make its own food (unlike plants, which are autotrophs). Animals are heterotrophs.
Himalayecetus subathuensis is the oldest-known whale fossil, about 53.5 million years old. Its fossilized jawbone and teeth were found in the Simla Hills of northern India, in the foothills of the Himalayan mountains. This area was underwater (in the Tethys sea) during the Tertiary period (when India was an island off Asia). This whale may have spent some of its time on land.
Homeothermic animals maintain a constant body temperature. Birds and mammals are homeothermic.
Megaptera novaeangliae is baleen whale which arcs its back into a hump before it dives. Humpback behavior includes acrobatic leaping out of the water, slapping of its fins and flukes on the water, and complex song that includes long sequences of squeaks, grunts, and other sounds. They eat mostly krill. plankton, and herring and are gulpers. It is a protected species.
A hydrophone is a device that is used to detect and record underwater sounds.
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