自然科学
通过学习生物、化学、物理和地质来加深你对自然世界的理解。
![蒲公英的种子吹](http://www.cellsaddle.com/thmb/nOmryR71IHAm4LS4wX6rQwkBgwA=/304x228/filters:no_upscale():max_bytes(150000):strip_icc()/dandelion-seeds-blowing-635ba932fb254a97b627e6551d860734.jpg)
蒲公英是如何“决定”传播种子的
![广西江景](http://www.cellsaddle.com/thmb/ZokYWZLREq4UMPuQQRK68hCgw6g=/304x228/filters:no_upscale():max_bytes(150000):strip_icc()/riverviewofGuangxiregionofChina-c3821238c4cd4c2f9f8f909c619a4f45.jpeg)
在中国偏远地陷中发现广袤的古代森林
![C. Militaris真菌有线声音](http://www.cellsaddle.com/thmb/RNPFOzepjBi2HvHGjklJf9Rk7RM=/304x228/filters:no_upscale():max_bytes(150000):strip_icc()/shroom1-f90a901c6c7446849dc76baaaa143219.jpg)
蘑菇可以用它们自己的真菌语言互相交谈
![大型冬季风暴给美国南部各州的大部分地区带来了冰雪](http://www.cellsaddle.com/thmb/wRRHNKXMHK_PJO9iSsa1oPtYo84=/304x228/filters:no_upscale():max_bytes(150000):strip_icc()/large-winter-storm-brings-ice-and-snow-to-large-swath-of-southern-states-up-through-northeast-1238171122-93c3e2a41ec74a489380e2c47b266f4d.jpg)
爆炸的树吗?低温使德克萨斯州的树木爆裂
![Jacquemontia cumanensis。](http://www.cellsaddle.com/thmb/XPSzqXME5zJAd3J_Py4ppoJ1kuw=/304x228/filters:no_upscale():max_bytes(150000):strip_icc()/12225_2021_9936_Fig14_HTMLcopy-265150d816994b7da1fa3111d7c38636.jpg)
玻利维亚发现5种新植物
![日落时,冰川高耸在徒步旅行者的头顶。](http://www.cellsaddle.com/thmb/MrN_XOeUP1iLIgjRZhAGJ9X4bEE=/304x228/filters:no_upscale():max_bytes(150000):strip_icc()/GettyImages-1282659142-e9c4e8a82f05455f947c39769eb5b9eb.jpg)
冰川、冰原和海冰有何不同?
![](http://www.cellsaddle.com/thmb/ieKkkuPwIs_uyf1Oqwce0DYyhZI=/304x228/filters:no_upscale():max_bytes(150000):strip_icc()/__opt__aboutcom__coeus__resources__content_migration__mnn__images__2020__04__rigid-cactus-coral-florida-aquarium-dae63c6e4dea467382fd64e19546ba20.jpg)
这一科学突破可能会启动美国大堡礁的复兴
![冬天,月亮的光环照耀着农舍。](http://www.cellsaddle.com/thmb/zEvEp-23PqxmB8g53c-w1f68hAM=/304x228/filters:no_upscale():max_bytes(150000):strip_icc()/GettyImages-1331563999-22ca27ce7da14f59a1434444d71575c9.jpg)
是什么导致月球周围出现光环?
![冲浪者在海浪中冲浪的鸟瞰图。](http://www.cellsaddle.com/thmb/AHMr1mesAK_sWWUWof_li7qcSBo=/304x228/filters:no_upscale():max_bytes(150000):strip_icc()/GettyImages-999984172-67c189dff547488095227056d32c721c.jpg)
什么导致了海洋中的波浪?能量分析与波浪类型
![黄昏时麦田上空满月的特写。](http://www.cellsaddle.com/thmb/ZzgKTWQMIUcmqc9jZPojzg-MeOY=/304x228/filters:no_upscale():max_bytes(150000):strip_icc()/GettyImages-1219675985-6deb726d71a649daac5b96a7041d4724.jpg)
什么是满月?
![磨砂苔原玫瑰](http://www.cellsaddle.com/thmb/NugRnnD8z2byTSn_kemGOp87yYM=/304x228/filters:no_upscale():max_bytes(150000):strip_icc()/GettyImages-901482062-6470b1099c6a47a881f9a22d7bca0d0a.jpg)
15种独特的苔原植物
![2021年7月22日,俄勒冈州布莱市,满月从被野火笼罩的山丘上升起。这场7月6日在俄勒冈州比蒂附近爆发的非法大火已经烧毁了39.9万英亩的土地,目前38%的火势得到了控制。](http://www.cellsaddle.com/thmb/MOjFEf7znVzomZT_aIQfWYgbiUA=/304x228/filters:no_upscale():max_bytes(150000):strip_icc()/GettyImages-1234121501-d7f06f3bbdd844e29434f5cad7162298.jpg)
美国野火产生的烟雾使月球呈现出怪异的颜色
![Bryum bharatiensis](http://www.cellsaddle.com/thmb/2QpMdqnlL354gsc3eJBhFb7SjFE=/304x228/filters:no_upscale():max_bytes(150000):strip_icc()/Bryum-Bharatiensis-ff6cbd1788ae49249105923749aa709c.jpeg)
南极发现新植物物种
![雪中越橘的叶子](http://www.cellsaddle.com/thmb/pU_S05w73DCjtEzCrSVwxwt1tJ4=/304x228/filters:no_upscale():max_bytes(150000):strip_icc()/GettyImages-1290661636-87d77e90b9254be59dde6f72a57aea7d.jpg)
15种在北方森林中茁壮成长的针叶林植物
![非洲草原上各种大型动物。](http://www.cellsaddle.com/thmb/Lq32znZA3y_NIP014kUqQMDllmw=/304x228/filters:no_upscale():max_bytes(150000):strip_icc()/GettyImages-900700320-b1b73ac1c38e434396c3cc48b8e640d3.jpg)
3生物多样性类型:概述和重要性
![当你能在俄勒冈州坎农海滩上看到银河时,谁还需要烟花呢?](http://www.cellsaddle.com/thmb/5_SKd--FND4uhiYXsiAFgqpdurw=/304x228/filters:no_upscale():max_bytes(150000):strip_icc()/10933380913_8204976b8a_o-8bad0aafee2444d891c885f107764b1a.jpg)
七月的夜空中可以看到什么
![一个英俊的男人透过目镜专注地看着什么](http://www.cellsaddle.com/thmb/aZ7zvwfiMb29G-PWzdvnPZaKdv4=/304x228/filters:no_upscale():max_bytes(150000):strip_icc()/a-handsome-man-looking-at-something-intently-through-inoculars-1269897316-1b48f35cfd4d4589ab6e7110ce5803fe.jpg)
什么是公民科学?历史、实践和影响
![在自然环境中觅食野果的鸟类](http://www.cellsaddle.com/thmb/a_5tkY2tXSYEvNbTo4XlgKZvsX8=/304x228/filters:no_upscale():max_bytes(150000):strip_icc()/bird-foraging-wild-fruit-in-natural-1298952293-b0b5569eb5254c879fdfb2aa341bbf5c.jpg)
为什么种子传播对森林恢复很重要?
![黑脉金斑蝶。达努plexippus](http://www.cellsaddle.com/thmb/AYzY9jMPPSfMecwfVgG_LQXcXRA=/304x228/filters:no_upscale():max_bytes(150000):strip_icc()/monarch-butterfly-danus-plexippus-825041618-7f2478cb28ce49c2bc46fdcfbf06afea.jpg)
什么是指示物种?定义和例子
![日出时,火山灰云从火山中升起](http://www.cellsaddle.com/thmb/zq0tlR_3TNs-lzwaBWyuGRt5-0M=/304x228/filters:no_upscale():max_bytes(150000):strip_icc()/GettyImages-1067994392-6ecbd2ad5b6045589a1761ccf9d5101a.jpg)
火山为什么会喷发?
![占主导地位的野猪](http://www.cellsaddle.com/thmb/c8Ivpof3NxgHQ4Lao5LxMONX1ls=/304x228/filters:no_upscale():max_bytes(150000):strip_icc()/GettyImages-1194062139-0ff404cdd7414f648f48ff61b4a32d0c.jpg)
入侵物种:野猪
![一个棕色的有斑纹的水槽虫的特写](http://www.cellsaddle.com/thmb/mpgelhPLDIY4WyuLqypUI5wrP_g=/304x228/filters:no_upscale():max_bytes(150000):strip_icc()/GettyImages-153554539-c6c0fbe8b1af458a868513b9d95214f5.jpg)
入侵物种:褐斑纹蝽
![一亿两千五百万年前恐龙的艺术再现](http://www.cellsaddle.com/thmb/urXJAIxDaVjVfrYu_EBlTs4jt3k=/304x228/filters:no_upscale():max_bytes(150000):strip_icc()/dinosaurs-fcf69795feb74481991dd7eb2ef69ab0.jpg)
灭绝恐龙的小行星产生了热带雨林
![樱花在东京盛开](http://www.cellsaddle.com/thmb/-_o7pTi5vPKMWYutIncMiBeyTXM=/304x228/filters:no_upscale():max_bytes(150000):strip_icc()/cherry-blossoms-bloom-in-tokyo-1308389849-fb544b4bcb0e47be8d7bd81dc3f76c52.jpg)
日本的樱花迎来了1200年来最早的盛开高峰
![有些种类的蝙蝠利用回声定位在夜间捕食](http://www.cellsaddle.com/thmb/lLhhs4_EogMYV3wBW_MXcjRvdc0=/304x228/filters:no_upscale():max_bytes(150000):strip_icc()/GettyImages-763168441-05e171568c884ee38c9e6b2b84a2d162.jpg)
回声定位是什么?动物和人类世界的定义和例子
![开花的樱桃枝与接近的蜜蜂](http://www.cellsaddle.com/thmb/8__1aOi78eIsla4S5FSdQqTU5jo=/304x228/filters:no_upscale():max_bytes(150000):strip_icc()/flowering-cherry-branch-with-approaching-bee-1217620403-92fe91dc4a26479293e22ddb043e55ba.jpg)
什么是物候学,为什么它很重要?
![台湾蓝泪生物发光藻](http://www.cellsaddle.com/thmb/I9cSUOKm9hFvvMN2WAr0TnYCJxs=/304x228/filters:no_upscale():max_bytes(150000):strip_icc()/GettyImages-583755006-334a1131cae64ee2b265bfe9c7a67355.jpg)
生物发光藻类:定义、原因和毒性
![《蓝色时刻》童书伊莎贝尔·西姆勒Éditions courtes et longues, 2015年](http://www.cellsaddle.com/thmb/fxCrqwemCPKIidGbz0MgpSicwII=/304x228/filters:no_upscale():max_bytes(150000):strip_icc()/the-blue-hour-isabelle-simler-1-c0989f40033e4fc1a6fb12d67a85baab.jpeg)
插画家令人眼花缭乱的工作突出了神奇的蓝色,大自然最罕见的颜色
![绿岸蟹攻击帽贝](http://www.cellsaddle.com/thmb/VVb2HlMEkHerpVLiN9pBEVI0Xc8=/304x228/filters:no_upscale():max_bytes(150000):strip_icc()/green-shore-crab-attacking-limpet-502804916-7372a7a9691249c39e128ebebb0420da.jpg)
绿蟹:关于这种入侵物种你应该知道的
![美国迈阿密南海滩的历史装饰艺术区](http://www.cellsaddle.com/thmb/bH1xShiziuEcmx-Cf48h_gdpWNc=/304x228/filters:no_upscale():max_bytes(150000):strip_icc()/historic-art-deco-district-in-south-beach--miami--usa-667865866-191bfa9a41eb43cd9a51cffd28517d68.jpg)
迈阿密海滩将更换棕榈树
![亚洲海岸蟹](http://www.cellsaddle.com/thmb/3KFNXm_yh3grjwsHMcEA1fF7ARM=/304x228/filters:no_upscale():max_bytes(150000):strip_icc()/asian-shore-crab-1005631112-a6e8ab6310ac4bee997f65530cacf76f.jpg)
亚洲岸蟹:关于这种入侵物种你应该知道的事
![海草和鱼在水中,圣克鲁斯岛,加利福尼亚州,美国](http://www.cellsaddle.com/thmb/LtmwaILge454koLv0dVnnuwdw80=/304x228/filters:no_upscale():max_bytes(150000):strip_icc()/seagrass-and-fish-in-water--santa-cruz-island--california--usa-975898416-4dd131ed24544de895fabd8cdebb319d.jpg)
什么是生态系统中的生物和非生物因素?
![钓鱼。大鲤鱼鱼在水中跳跃溅起水花](http://www.cellsaddle.com/thmb/hn0C9Or1F2T0XeVHTYypsXlDJb4=/304x228/filters:no_upscale():max_bytes(150000):strip_icc()/fishing--big-carp-fish-jumping-with-splashing-in-water-968533760-ab607ffc73cf4e17868350ab9707b34a.jpg)
入侵物种:为什么亚洲鲤鱼是一个问题?
![明暗斑驳的飞蛾在石墙上飞舞](http://www.cellsaddle.com/thmb/lRn1QQ8D_g7RpWkAJten8ia0lak=/304x228/filters:no_upscale():max_bytes(150000):strip_icc()/GettyImages-821828926-3990616747d248d2aa28f489cf8836be.jpg)
什么是工业黑化?
![地形照片拼贴Josh Dykgraaf](http://www.cellsaddle.com/thmb/6IiaUN9grzx-58xPsWuI7ZcLFVQ=/304x228/filters:no_upscale():max_bytes(150000):strip_icc()/photo-collages-josh-dykgraaf-7A-1e16398bdff6491282ccbec6b7c0c6be.jpg)
艺术家的超现实照片拼贴合并植物群与动物
![杰西·菲尼克斯在加利福尼亚的熔岩流中。](http://www.cellsaddle.com/thmb/ze02acHOrk13jGAODg4f4EWUaOU=/304x228/filters:no_upscale():max_bytes(150000):strip_icc()/JessPhoenix-1723f98f62d34c5da52ad0d0d8dca715.jpg)
走进火山学家的大脑
![斑马贻贝群(多形德雷塞纳)](http://www.cellsaddle.com/thmb/pOyIGmu7RLMTA5N1h4ohtedgBvM=/304x228/filters:no_upscale():max_bytes(150000):strip_icc()/zebra-mussel-colony--dreissena-polymorpha--a-serious-exotic-species-1075608570-8467a76fb59e47fc9380f31539414de9.jpg)
斑马贻贝:你应该知道的
![澳大利亚大堡礁的珊瑚白化现象](http://www.cellsaddle.com/thmb/lNG6R1zv4i0-5CxpObHjF6YU7ok=/304x228/filters:no_upscale():max_bytes(150000):strip_icc()/coral-bleaching-on-the-great-barrier-reef-in-australia-1214651199-afa0080ddcc44806968d0c129fd06a76.jpg)
珊瑚白化的原因是什么?我们的珊瑚礁能否恢复?
![栗色钟山峰和白杨树在秋天的颜色](http://www.cellsaddle.com/thmb/pFGYY72gfej9xXHRfXx4WL3xJLw=/304x228/filters:no_upscale():max_bytes(150000):strip_icc()/maroon-bells-mountain-peaks---aspen-trees-in-autumn-color-155437483-acfc77fdd4784af3ada0fbd7f6573e40.jpg)
著名的阿斯彭地震预计将受到气候变化的影响
![巨型泰坦魔芋在巴塞尔绽放](http://www.cellsaddle.com/thmb/gqzLucjfdu9bpcM2t1WxkRaQrMs=/304x228/filters:no_upscale():max_bytes(150000):strip_icc()/giant-titan-arum-flower-blooms-in-basel-113080216-35dbd14fb070446c88037892f06cc66e.jpg)
尸花:描述,生命周期,事实,和更多
灭绝的植物比我们之前认为的要多
![灌木丛生的树的特写](http://www.cellsaddle.com/thmb/NcO8s5PlNZ7_Scrd0noPNVquibg=/304x228/filters:no_upscale():max_bytes(150000):strip_icc()/close-up-of-a-copsed-tree-in-radley-village---oxfordshire-england-1139844950-3cd193cf36144bd5ad87a665ba421852.jpg)
木材粘接的永续栽培实践
![用图表标出形状的岩石](http://www.cellsaddle.com/thmb/NTja5Xf0zMvcyoJZqyW5PDBlLM8=/304x228/filters:no_upscale():max_bytes(150000):strip_icc()/cubes-8f4fcc191dfd417f8a1ca25ea7a5ec95.jpg)
地球由立方体构成
![彭斯顿花,约翰斯顿岭,圣海伦斯山,华盛顿](http://www.cellsaddle.com/thmb/srR7NH5Gk3goMdNffEJmyX9DX7Y=/304x228/filters:no_upscale():max_bytes(150000):strip_icc()/penstemon-flowers--johnston-ridge--mt-st-helens--washington-10175498-59542d8c566045f2901abccffc3759fe.jpg)
什么是先锋物种?定义和例子
![暴露在风中的树](http://www.cellsaddle.com/thmb/OAwydQgcX1YqwgholB7Y9GVTaao=/304x228/filters:no_upscale():max_bytes(150000):strip_icc()/windswepttrees-db7e87694e8b4632a7ba9a5ee42411fb.jpg)
欢迎来到怪人协会
![潜水员和鱼类在大堡礁](http://www.cellsaddle.com/thmb/0yL-FYnl7QD_KJGy2P6F7JuJFQE=/304x228/filters:no_upscale():max_bytes(150000):strip_icc()/diverandfishonGreatBarrierReef-c764127bf76245e5ae7d2d851616ce6b.jpg)
水下珊瑚礁“音乐”吸引小鱼到退化的珊瑚
![纳什维尔动物园尸花](http://www.cellsaddle.com/thmb/03LdmNIFhLNFYS5QUAn5esoXbBQ=/304x228/filters:no_upscale():max_bytes(150000):strip_icc()/corpse-flower-detail-cd1ccf1a0fe043f39b3b63801c9f250a.jpg)
在纳什维尔动物园,臭而华丽的尸体花盛开
一男子在阿肯色州公园发现9克拉钻石
![](http://www.cellsaddle.com/thmb/6nLH0S4tLZ1jXrywi2LwJE8elG8=/304x228/filters:no_upscale():max_bytes(150000):strip_icc()/__opt__aboutcom__coeus__resources__content_migration__mnn__images__2019__05__shutterstock_1250460616-a594511109ab4d469b0cfad4de485d90.jpg)
一个非常大、非常黑的东西在我们的银河系打了一个洞
![](http://www.cellsaddle.com/thmb/oTmxWrcCAJI-FcA0huNCWt4LZoY=/304x228/filters:no_upscale():max_bytes(150000):strip_icc()/__opt__aboutcom__coeus__resources__content_migration__mnn__images__2016__12__lucy-australopithecus-reconstruction-a0a67f1ce80f485eb7d208929166ca18.jpg)
关于古猿露西的8个有趣的事实
什么是选择性育种?
![美国有5座危险的火山](http://www.cellsaddle.com/thmb/t4wq_mD2RSXAAiruG6u5QDwa-AU=/304x228/filters:no_upscale():max_bytes(150000):strip_icc()/which-us-volcanoes-are-likely-to-erupt-next-4864199_final-fadd5233660e49dbaeee9091740671bf.png)
美国18座最危险的火山
![野外野花的近景,包括黄色和紫色。](http://www.cellsaddle.com/thmb/UK-HxUJAmgWb-O2ue22JgOu1frA=/304x228/filters:no_upscale():max_bytes(150000):strip_icc()/why-biodiversity-big-deal-4868786-03-571ea770f6cf42499fb5fbe9cb1f77fe.jpg)
生物多样性很重要的5个原因
![阳光下尼安德特人雕像手持手杖的侧面](http://www.cellsaddle.com/thmb/HW2i2qNGVfN99sY6fu4zKSOqyEc=/304x228/filters:no_upscale():max_bytes(150000):strip_icc()/neanderthal.primary-d8ac39668d68416c86812d26c1b5675d.jpg)
关于尼安德特人的10个惊人事实
![加拿大的北方森林](http://www.cellsaddle.com/thmb/6swEWbCerc-8WBZJgZ41xQsoFW0=/304x228/filters:no_upscale():max_bytes(150000):strip_icc()/GettyImages-487213100-aca2cbde4c294e148cb346886754a7a7.jpg)
关于北方森林的30个迷人的事实
![说明影响叶大小的四个因素的插图](http://www.cellsaddle.com/thmb/v2PCk8bUh-uMJRPEN559nmAE9ow=/304x228/filters:no_upscale():max_bytes(150000):strip_icc()/leaves-different-shapes-sizes-4864228_V2-3f449de7cdc042f3a36d8789dbe908a8.png)
为什么叶子有如此不同的形状?
![森林的树木](http://www.cellsaddle.com/thmb/10ssJ6H4mMZ68i1PAdcHfbtib-s=/304x228/filters:no_upscale():max_bytes(150000):strip_icc()/8860298334_509c5f9698_o-2fba9e1a26cc465bb9d4f9b659b2296d.jpg)
树可以互相交谈并识别自己的后代
![法国宽河和土路,温泉,北卡州](http://www.cellsaddle.com/thmb/Mm8cOxsBgjbAnn4t6DMkcFCJXTI=/304x228/filters:no_upscale():max_bytes(150000):strip_icc()/french-broad-river-and-dirt-road--hot-springs--nc-1303675805-fcb062aab8694eaeb1964cb1eb6167b2.jpg)
树木如何过冬?休眠的科学
![](http://www.cellsaddle.com/thmb/BLfSSI6GWaknrUg8FJqB5mdjEis=/304x228/filters:no_upscale():max_bytes(150000):strip_icc()/__opt__aboutcom__coeus__resources__content_migration__mnn__images__2020__04__Lendbreen-viking-highway-6188b36cfe9e43ffb16af3e29e3ddc7f.jpg)
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