冰期时海平面比现在低多少，古人类怎么走到美洲？
How much lower was sea level in ice ages, and how did ancient humans reach the Americas?
盛冰期海平面比今天低约120米，白令海峡变成连着亚洲和北美的“陆桥”，古人便从西伯利亚走过陆桥进入美洲。
At the last glacial maximum sea level was about 120 m lower, turning the Bering Strait into a land bridge linking Asia and North America, which people walked across.
难度 专业 · 适合 大众
CC BY 4.0 · 已核验 · Verified 2026-08-23 · 2 条独立证据
来源 · Source
Wicander & Monroe,《Historical Geology》Cengage 多版
R. Wicander and J. S. Monroe, Historical Geology, Cengage Learning, various editions
独立核验依据 · Independent verification: 核验依据 2 OPENLIBRARY 标识 /works/OL79786W：Historical geology（按标题+作者
#冰期 #白令陆桥
大陆漂移学说最早是谁提出的，当时为什么被嘲笑？
Who first proposed continental drift, and why was it mocked?
20世纪初德国科学家魏格纳提出，说各大陆曾是一整块后来裂开漂移。当时缺少“什么力量推动”的证据，所以被很多人嘲笑。
In the early 1900s German scientist Wegener argued continents were once one and drifted apart. Lacking a driving-force mechanism, many scientists mocked it.
难度 专业 · 适合 大众
CC BY 4.0 · 已核验 · Verified 2026-08-23 · 2 条独立证据
来源 · Source
Wicander & Monroe,《Historical Geology》Cengage 多版
R. Wicander and J. S. Monroe, Historical Geology, Cengage Learning, various editions
独立核验依据 · Independent verification: 核验依据 2 OPENLIBRARY 标识 /works/OL79786W：Historical geology（按标题+作者
#魏格纳 #大陆漂移
把“大陆漂移”做成动画，恐龙是怎么跟着“分家”的？
In an animation of continental drift, how do the dinosaurs “split up”?
动画里先显示泛大陆完整的恐龙分布，再随时间把大陆缓缓拉开，原本相连的栖息地随之断开，化石记录就和今天各大陆对应起来。
The animation first shows dinosaurs across a united Pangaea, then slowly pulls the continents apart; formerly connected habitats split, matching today's fossil record per continent.
难度 专业 · 适合 大众
CC BY 4.0 · 已核验 · Verified 2026-08-23 · 2 条独立证据
来源 · Source
Wicander & Monroe,《Historical Geology》Cengage 多版
R. Wicander and J. S. Monroe, Historical Geology, Cengage Learning, various editions
独立核验依据 · Independent verification: 核验依据 2 OPENLIBRARY 标识 /works/OL79786W：Historical geology（按标题+作者
#大陆漂移 #动画
为什么各大陆都挖到恐龙化石，难道恐龙会“环球旅行”？
Why are dinosaur fossils found on every continent—did dinosaurs travel the world?
不是恐龙会走，而是它们生活的年代各大陆还连在一起（泛大陆）。后来大陆漂移分开，恐龙化石也就散落到了各地。
The dinosaurs didn't migrate; they lived when the continents were joined (Pangaea). After the land split and drifted, their fossils ended up on separate continents.
难度 进阶 · 适合 大众
CC BY 4.0 · 已核验 · Verified 2026-08-23 · 2 条独立证据
来源 · Source
Wicander & Monroe,《Historical Geology》Cengage 多版
R. Wicander and J. S. Monroe, Historical Geology, Cengage Learning, various editions
独立核验依据 · Independent verification: 核验依据 2 OPENLIBRARY 标识 /works/OL79786W：Historical geology（按标题+作者
#泛大陆 #恐龙