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Whales were intensively hunted during this time; in the 1930s, 30,000 whales were killed. This increased to over 40,000 animals per year up to the 1960s, when stocks of large baleen whales collapsed. [citation needed] Most hunted whales are now threatened, with some great whale populations exploited to the brink of extinction.
Whales do not lay eggs. Since they are mammals, they give birth to live young. There are only five known monotremes , or egg-laying mammals, according to the Carnegie Museum of Natural History.
Whales are fully aquatic, open-ocean animals: they can feed, mate, give birth, suckle and raise their young at sea. Whales range in size from the 2.6 metres (8.5 ft) and 135 kilograms (298 lb) dwarf sperm whale to the 29.9 metres (98 ft) and 190 tonnes (210 short tons) blue whale, which is the
They have one opening for excretion and reproduction called the cloaca. They hold the eggs internally for several weeks, providing nutrients, and then lay them and cover them like birds . Like marsupial " joeys ", monotreme " puggles " are larval and fetus-like, [ 9 ] as like them they cannot expand their torso due to the presence of epipubic ...
A professional diver captured a rare video at the beginning of June of a group of sperm whales 'cuddling'. Kayleigh was having a lucky day using a drone for the first time when she noticed the ...
[Marine Biologist Lisa Steiner]"I'm probably one of the original sperm whale geeks basically."Marine biologist Lisa Steiner has made it her life’s workto help people understand sperm whales ...
There is no life without water. [9] It has been described as the universal solvent for its ability to dissolve many substances, [10] [11] and as the solvent of life. [12] Water is the only common substance to exist as a solid, liquid, and gas under conditions normal to life on Earth. [13]
The Great Whales 1978 1987 90 ... Middle Names Educational Video Presentations 51515 ... School Time Educational Video Presentations 51517 People