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Home»Posts tagged with»cretaceous

New ancient fish species earliest known salmon ancestor

By Marmian Grimes | UAF on May 14, 2025   Featured, The Arctic and Alaska Science  

New ancient fish species earliest known salmon ancestor

The Arctic landscape during the Cretaceous Period may have been dominated by the dinosaurs, but the rivers and streams held something more familiar. Alaska’s fresh waters 73 million years ago were teeming with the ancient relatives of today’s salmon, pike and other northern fish. A new paper published this week in the journal Papers in […]

Precipitation Helped Drive Distribution of Alaska Dinosaurs

By Rod Boyce | Geophysical Institute on May 3, 2022   Featured, The Arctic and Alaska Science  

Precipitation Helped Drive Distribution of Alaska Dinosaurs

Precipitation more than temperature influenced the distribution of herbivorous dinosaurs in what is now Alaska, according to new research published this month. The finding, published April 2 in the journal Geosciences, discusses the distribution of hadrosaurids and ceratopsids — the megaherbivores of the Late Cretaceous Period, 100.5 million to 66 million years ago. The work […]

Meet Callichimaera Perplexa, the Platypus of Crabs

By Jim Shelton | Yale News on Apr 25, 2019   Featured, Science/Education  

Meet Callichimaera Perplexa, the Platypus of Crabs

   Watch the video to see an animated, three-dimensional recreation of the puzzling mid-Cretaceous crab that forces a rethink of what a crab is.(Video credit: Daniel Ocampo R., Vencejo Films, & Javier Luque, Yale University [images]; animation and 3D reconstruction by Alex Duque) The crab family just got a bunch of new cousins, including […]

North Dakota Site shows Wreckage from same Object that Killed the Dinosaurs

By University of Washington Staff on Mar 30, 2019   Featured, Science/Education  

North Dakota Site shows Wreckage from same Object that Killed the Dinosaurs

  An excavation site in North Dakota sheds new light on what happened when a giant meteorite struck planet Earth, 66 million years ago. On that day, violent ground shaking first raised giant waves in the waters of an ancient inland sea. Then tiny beads began to fall, created from molten rock cooling at the […]

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