Due to over-fishing and dams, wild salmon have declined by 90% in Washington, Oregon and California. That decline has a much broader effect than what might be expected. Salmon need forests for shade, to keep streams cool, and forests need salmon to provide between 25% and 50% of their nutrients, particularly nitrogen essential for protein production.
The documentary film, “Our Gorongosa: A Park for the People,” will have its United States premiere at 8 p.m. on Tuesday on Idaho Public Television.
The course of life on Earth changed radically on a single day 66 million years ago. An asteroid blasted our planet, causing the extinction of up to three quarters of all plant and animal species. The impact ended the Age of Dinosaurs and launched our age, the Age of Mammals. But our understanding of the asteroid's aftermath has been spotty. Who survived? How quickly did mammals and their habitats spring back? How did our planet recover from this global cataclysm?
Ever wondered how life on Earth evolved after a giant asteroid wiped out the dinosaurs some 66 million years ago? In a special edition of PBS's NOVA, titled "Rise of the Mammals," scientists from the Denver Museum of Nature & Science reveal findings from a major discovery of fossils that help provide a timeline for the first million years of mammal life.
...Sahithi has already earned a top award at an international science fair and was profiled in the documentary Inventing Tomorrow.
For the first time, the researchers were able to establish animals, plants, temperatures and a timeline of when they occurred, providing an overview of the first million years after the mass extinction event to see how the entire ecosystem recovered.
In central Colorado, at a place called Corral Bluffs, there lies an unusual graveyard. The ranks of the dead aren’t filled with people, but animals that lived 66 million years ago. Preserved in hardened concretions of stone lie the remains of turtles, crocodiles, and most of all, mammals that lived in this place during the first million years after the terrible impact that triggered the extinction of the dinosaurs.
A remarkable trove of fossils from Colorado has revealed details of how mammals grew larger and plants evolved after the cataclysm that killed the dinosaurs.
Rock formations called concretions hid the fossils inside, like chocolate tucked in a candy shell. Having cracked the code for cracking open fossils, the paleontologists found nearly 1,000 vertebrate remains, including mammal bones, turtle shells and crocodilian skulls. They found 6,000 petrified leaves and other plant parts. They also found 37,000 grains of fossilized pollen.
An unusually rich trove found in Colorado reveals the world in which our mammalian forebears evolved into larger creatures.
