BGuthrie Photos: DC -- Natl Museum of Natural History -- Exhibit: The David H. Koch Hall of Fossils -- Deep Time

DC -- Natl Museum of Natural History -- Exhibit: The David H. Koch Hall of Fossils -- Deep Time:

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[15] SINHDT_210711_049.JPG	[16] SINHDT_210711_055.JPG	[17] SINHDT_210711_057.JPG
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Specific picture descriptions: Photos above with "i" icons next to the bracketed sequence numbers (e.g. "[1] ") are described as follows:
1. SINHDT_210711_022.JPG: Past: A Global Heat Wave Fossils show up that 56 million years ago, atmospheric carbon (CO2) doubled in just a few thousand years, and global temperatures spiked 10-11 degrees F (6 degrees C). The results were profound.
2. SINHDT_210711_032.JPG: Ecosystems Changed When the climate became hotter and drier, mammals and plants that liked it hot and dry replaced those that liked it warm and wet.
3. SINHDT_210711_034.JPG: Before Wyoming had been subtropical -- with large reptiles, small mammals, and lush vegetation, including palm trees.
4. SINHDT_210711_037.JPG: During As the climate changed, plants and animals that could survive hot, dry conditions replaced earlier types.
5. SINHDT_210711_041.JPG: After As the heat wave faded, Wyoming became wetter again. Many species returned, but some had gone extinct.
6. SINHDT_210711_044.JPG: Plants Become Less Nutritious When plants grow under high CO2, their leaves contain less protein. Animals must eat more to meet their needs.
7. SINHDT_210711_047.JPG: During Fossil leaves show evidence of more insect feeding during the heat wave.
8. SINHDT_210711_057.JPG: After
9. SINHDT_210711_065.JPG: Animals Got Smaller The early hoofed mammal Ectocion lived in Wyoming before, during, and after the heat wave, but individuals were much smaller during the heat wave. Scientists are still investigating why. When temperatures cooled again, Ectocion got larger.
10. SINHDT_210711_067.JPG: Before A large species of early hoofed mammal
11. SINHDT_210711_069.JPG: During A smaller species of early hoofed mammal
12. SINHDT_210711_071.JPG: After Another large species of early hoofed mammal
13. SINHDT_210711_078.JPG: Today: A New Global Heat Wave Today, CO2 and temperatures are rising much faster than they did 56 million years ago. The more carbon we put in the atmosphere, the warmer it will get, and the longer it will stay warm.
14. SINHDT_210711_081.JPG: Sea Levels Are Rising Sea levels are rising as warmer waters expand and glacial ice melts. The ocean is also become more acidic, which threatens some marine life.
15. SINHDT_210711_084.JPG: Droughts Are Increasing Higher temperatures make longer, more severe droughts more likely. Droughts jeopardize food production, making it harder to feed a growing population.
16. SINHDT_210711_090.JPG: Species Are Adapting, Moving, Perishing Some plants flower earlier, animals change their seasonal cycles, and species move to new areas. Many are threatened with extinction.
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Description of Subject Matter: The David H. Koch Hall of Fossils -- Deep Time
June 8, 2019 – Permanent
In its new pose devouring a Triceratops, the Nation’s T. rex is the centerpiece of the David H. Koch Hall of Fossils—Deep Time.
This exhibition showcases the museum’s unrivaled collection of 46 million fossils, presents the most up-to-date scientific research on how life on Earth has evolved, and presents the fossil record in new ways to show how dinosaurs and other extinct creatures lived in changing environments.
Major themes woven in stories throughout the hall include:
* All life is connected—past, present and future—to all other life and to the Earth itself.
* Evolution: Life is continually changing through time.
* Ecosystems Change: Ecosystems changed through time and continue to do so.
* Earth Processes: Geological processes and global cycles cause ecosystem and evolutionary changes.
* Extinction: Mass extinctions have both periodically devastated and created new opportunities for life on Earth. Background extinctions occur one or a few at a time, scattered across the tree of life. Extinction of some species opens up opportunities for others to evolve.
* Human Connections: Humans, today’s world and the plants and animals people depend upon have intimate connections to deep time.
* Age of Humans and Global Change: Now, more than ever before, people are influencing life on Earth on the scale of geologic forces from the past. Humans are not only shaping the future but also the fate of life on Earth.
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