deep time

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Devils Tower landscape, Devils Tower National Monument, 2016.

Devils Tower landscape, Devils Tower National Monument, 2016.

Devils Tower was the first declared United States National Monument, established in 1906 by President Theodore Roosevelt. The formation itself rises 1,267 feet above the Belle Fourche River and stands an impres... More

Top of the postpile, Devil's Postpile National Monument, 2014.

Top of the postpile, Devil's Postpile National Monument, 2014.

Pictured: the top of the postpile is naturally uneven due to weathering and erosion. Description: Current studies suggest the postpile itself is under 100,000 years old, created when a lava flow cooled and crac... More

The postpile, Devil's Postpile National Monument, 2014.

The postpile, Devil's Postpile National Monument, 2014.

Current studies suggest the postpile itself is under 100,000 years old, created when a lava flow cooled and cracked into multi-sided columns. But how and why did this occur? The most recent volcanic activity in... More

Hagerman Fossil Beds, Hagerman Fossil Beds National Monument, 2015.

Hagerman Fossil Beds, Hagerman Fossil Beds National Monument, 2015.

Pictured: Hagerman Fossil Beds as seen from the Snake River. This area contains fossils of species alive during the Pliocene Epoch, 3-4 million years ago. See what not-so-ancient life was like with almost 150 t... More

Visitor Center diorama, Agate Fossil Beds National Monument, 2016.

Visitor Center diorama, Agate Fossil Beds National Monument, 2016.

Reconstructed skeletons of Miocene age mammals aid in understanding the early 1900s excavations. Mammals found at Agate Fossil Beds National Monument date from the early Miocene Epoch (19-21 million years ago).... More

The Smithsonian National Museum of Natural History's

The Smithsonian National Museum of Natural History's

The Smithsonian National Museum of Natural History's updated fossil hall, opening June 8, 2019, displays snapshots of the past, such as this Diplodocus reaching out to feed.

The Smithsonian National Museum of Natural History's

The Smithsonian National Museum of Natural History's

The Smithsonian National Museum of Natural History's updated fossil hall, opening June 8, 2019, displays snapshots of the past, such as this Diplodocus reaching out to feed.

The Smithsonian's National Museum of Natural History

The Smithsonian's National Museum of Natural History

The Smithsonian's National Museum of Natural History will reopen its fossil hall 'Deep Time' on June 8, 2019. The exhibition will feature an authentic Tyrannosaurus rex skeleton alongside more than 700 other fo... More

The Smithsonian's National Museum of Natural History

The Smithsonian's National Museum of Natural History

The Smithsonian's National Museum of Natural History will reopen its fossil hall 'Deep Time' on June 8, 2019. The exhibition will feature an authentic Tyrannosaurus rex skeleton alongside more than 700 other fo... More

The Nation's T. rex will be the centerpiece for the

The Nation's T. rex will be the centerpiece for the

The Nation's T. rex will be the centerpiece for the Smithsonian's National Museum of Natural History remodeled fossil hall 'Deep Time', opening to the public on June 8, 2019. The T. rex is owned by the U.S. Arm... More

The Smithsonian's National Museum of Natural History

The Smithsonian's National Museum of Natural History

The Smithsonian's National Museum of Natural History will reopen its fossil hall 'Deep Time' on June 8, 2019. The exhibition will feature an authentic Tyrannosaurus rex skeleton alongside more than 700 other fo... More

The Nation's T. rex is the centerpiece for the Smithsonian's

The Nation's T. rex is the centerpiece for the Smithsonian's

The Nation's T. rex is the centerpiece for the Smithsonian's National Museum of Natural History remodeled fossil hall 'Deep Time', opening to the public on June 8, 2019. The T. rex is owned by the U.S. Army and... More

The Nation's T. rex is the centerpiece for the Smithsonian's

The Nation's T. rex is the centerpiece for the Smithsonian's

The Nation's T. rex is the centerpiece for the Smithsonian's National Museum of Natural History remodeled fossil hall 'Deep Time', opening to the public on June 8, 2019. The T. rex is owned by the U.S. Army and... More

The Nation's T. rex is the centerpiece for the Smithsonian's

The Nation's T. rex is the centerpiece for the Smithsonian's

The Nation's T. rex is the centerpiece for the Smithsonian's National Museum of Natural History remodeled fossil hall 'Deep Time', opening to the public on June 8, 2019. The T. rex is owned by the U.S. Army and... More

The Nation's T. rex is the centerpiece for the Smithsonian's

The Nation's T. rex is the centerpiece for the Smithsonian's

The Nation's T. rex is the centerpiece for the Smithsonian's National Museum of Natural History remodeled fossil hall 'Deep Time', opening to the public on June 8, 2019. The T. rex is owned by the U.S. Army and... More

The Smithsonian's National Museum of Natural History

The Smithsonian's National Museum of Natural History

The Smithsonian's National Museum of Natural History will reopen its fossil hall 'Deep Time' on June 8, 2019. The exhibition will feature an authentic Tyrannosaurus rex skeleton alongside more than 700 other fo... More

The Smithsonian's National Museum of Natural History

The Smithsonian's National Museum of Natural History

The Smithsonian's National Museum of Natural History will reopen its fossil hall 'Deep Time' on June 8, 2019. The exhibition will feature an authentic Tyrannosaurus rex skeleton alongside more than 700 other fo... More

The Smithsonian's National Museum of Natural History

The Smithsonian's National Museum of Natural History

The Smithsonian's National Museum of Natural History will reopen its fossil hall 'Deep Time' on June 8, 2019. The exhibition will feature an authentic Tyrannosaurus rex skeleton alongside more than 700 other fo... More

The Smithsonian's National Museum of Natural History

The Smithsonian's National Museum of Natural History

The Smithsonian's National Museum of Natural History will reopen its fossil hall 'Deep Time' on June 8, 2019. The exhibition will feature an authentic Tyrannosaurus rex skeleton alongside more than 700 other fo... More