国产精品美女一区二区三区-国产精品美女自在线观看免费-国产精品秘麻豆果-国产精品秘麻豆免费版-国产精品秘麻豆免费版下载-国产精品秘入口

Set as Homepage - Add to Favorites

【sex and orgasam videos】How whales went from just big to absolutely enormous

Source：Global Hot Topic Analysis Editor：knowledge Time：2025-07-03 03:59:25

Blue whales are sex and orgasam videosamong the biggest creatures on the planet today. But a few million years ago, they were practically petite.

Scientists think they know why these whales gained so much weight.

Environmental changes likely altered the distribution of whales' food supplies in a way that rewarded gargantuan creatures, a new study found. That likely prompted blue whales to balloon ten-fold, from roughly 10 feet long to their present size of up to 100 feet.

SEE ALSO: Dozens of humpback whales have died in the last year and nobody knows why

Scientists traced the transformation of whale sizes back nearly 30 million years. They found that very large whales only appeared along several branches of the family tree some 2 million to 3 million years ago, according to a study published this week in Proceedings of the Royal Society B.

"We live in a time of giants," Jeremy Goldbogen, an author of the paper and a marine biologist at Stanford University, said in a press release. Baleen whales, the filter-feeding beasts that include blue whales, "have never been this big, ever."

Original image replaced with Mashable logoOriginal image has been replaced. Credit: Mashable

Goldbogen and colleagues from the University of Chicago and the Smithsonian National Museum of Natural History measured more than 140 museum specimens of fossilized whales. Using a statistical model, they found that several distinct lineages of baleen whales developed independently of one another starting around 4.5 million years ago.

"...All of a sudden -- 'boom' -- we see them get very big, like blue whales," Nicholas Pyenson, an author of the paper and the curator of fossil marine mammals at the Smithsonian, told the New York Times.

Mashable Light Speed Want more out-of-this world tech, space and science stories? Sign up for Mashable's weekly Light Speed newsletter. By clicking Sign Me Up, you confirm you are 16+ and agree to our Terms of Use and Privacy Policy. Thanks for signing up!

"It's like going from whales the size of minivans to longer than two school buses," he said.

Their expansion coincided with the early development of ice sheets in the Northern Hemisphere, which likely changed the distribution of the tiny krill and plankton that whales eat.

Up until then, the minuscule prey would've been fairly evenly distributed throughout the ocean. As filter feeders, whales can swallow swarms of crustaceans in a single massive gulp, but they were still only moderately large marine mammals.

Original image replaced with Mashable logoOriginal image has been replaced. Credit: Mashable

As glaciers formed, however, run-off from the new ice caps would've washed nutrients into coastal waters at particular times of the year, boosting food supplies seasonally, instead of year-round. The Earth's cooling poles also affected ocean currents in a way that caused dense patches of prey to become more predominant.

This all created a seafood feast for the whales. But it meant they had to travel farther and work harder to find each meal. Being large meant the whales could not only swallow more prey when they found it, but they could also migrate very long distances to sustain that all-you-can-eat feeding style.

Researchers said the new findings on ancient whales could shed light on what's happening on the planet today.

Human-caused global warming is accelerating the thinning and retreating of sea ice, causing glaciers to melt at unprecedented rates, and warming and acidifying the oceans -- not over the course of millennia, but mere centuries.

"With these rapid changes, does the ocean have the capacity to sustain several billion people and the world’s largest whales?" Pyenson said in a press release. "The clues to answer this question lie in our ability to learn from Earth’s deep past... embedded in the fossil record."

Featured Video For You
Man swims and frolics with a orca whale in the wild

0.1439s , 12220.4765625 kb

Copyright © 2025 Powered by 【sex and orgasam videos】How whales went from just big to absolutely enormous,Global Hot Topic Analysis  

Sitemap

Top 主站蜘蛛池模板： 97在线中文字幕观看视频 | 午夜视频在线观看国产www | 91在线无码精品秘入口竹美 | 99国产揄拍国产精品 | 午夜全免费一级毛片在线播放 | 91久久视频平台是否值得尝试 | 99国产精品一区无码 | 国产白丝亚洲 | 午夜小视频在线观看欧美日韩手机在线 | 午夜精品国产欧美日韩久 | 国产aaa午夜激 | 午夜老司机免费在线观 | 国产v | av鲁丝一区二区三区 | 91精品国产在热久久下载 | av无码专区亚洲av麻豆 | av无码久久久久不卡网站下载 | aⅴ中文字幕 | 91制片国产自产在线观看 | 国产97最新在线视频 | 99精品久久久久久久婷婷 | 99久久精品九九亚洲精品 | 午夜在线观看免费影院 | 午夜福利无码专区影院 | 91精品无码中文字幕在线 | 波多野结衣办公室33分jian情 | 午夜视频在线网站 | 69一区二三区好的精华 | 18成禁人视频免费网站 | 波多野结衣超清无码教师 | a片免费网址网站 | 午夜十二点| 高清无码网站在线观看 | 国产av国片精品无套内谢蜜臀 | 91人妻无码精品一区二区夜色 | 99精品一区二区在线观看 | 午夜激情影院操一操 | av激情亚洲男人的天堂 | 午夜男女羞羞刺激爽爽影院 | 91精品久久久久久久久入口 | 白丝jk被折磨到高潮视频 |