Did people and dinosaurs live at the same time?
No! After the dinosaurs died out, nearly 65 million years passed before people appeared on Earth. However, small mammals (including shrew-sized primates) were alive at the time of the dinosaurs. Many scientists who study dinosaurs (vertebrate paleontologists) now think that birds are direct descendants of one line of carnivorous dinosaurs, and some consider that they in fact represent modern living dinosaurs. This theory remains under discussion and shows that there is still much we don't know about dinosaurs.
The Tertiary is a system of rocks, above the Cretaceous and below the Quaternary, that defines the Tertiary Period of geologic time. T
Toxic metals such as iron, lead and arsenic may have helped cause mass extinctions in the world’s oceans millions of years ago, according to recent research from the U.S. Geological Survey, the National Center for Scientific Research, France; and Ghent University, Belgium.
Recently, U.S. Geological Survey researchers and partners working in California’s Channel Islands National Park discovered mammoth remains in uplifted marine deposits that date to about 80,000 years ago, confirming a long-held but never proven hypothesis that mammoths may have been on the Channel Islands long before the last glacial period 25,000 to 12,000 years ago.
Four years ago, a bulldozer operator turned over some bones during construction at Ziegler Reservoir near Snowmass Village, Colorado. Scientists from the Denver Museum of Nature & Science were called to the scene and confirmed the bones were those of a juvenile Columbian mammoth, setting off a frenzy of excavation, scientific analysis, and international media attention.
An Ice Age fossil site recently discovered in Snowmass Village, Colo., is providing a trio of U.S. Geological Survey scientists with a laboratory to study more than 100,000 years of vegetation and climate records in Colorado.
The urban bedrock of a low-relief landscape beneath a crowded city seems like an unusual place for a significant fossil discovery. However, four distinct fossil sites found along the walls of canals in metropolitan Miami, Florida, indicate these locations were once a unique marine habitat.
The presence of 125,000-year-old microfossils in the muds of San Francisco Bay may help engineers decide where and how to rebuild the San Francisco-Oakland Bay Bridge, according to a U.S. Geological Survey(USGS)scientist in Menlo Park, Calif.
Many human activities can be unintentionally harmful to biological crusts. The biocrusts are no match for the compressional stress caused by footprints of livestock or people or tracks from vehicles.
Arid and semiarid ecosystems are expected to experience significant changes in temperature and precipitation patterns, which may affect soil organisms in ways that...
Bones of a juvenile mammoth spilling out of the ground in Tule Springs Fossil Beds National Monument (TUSK). USGS scientists are currently investigating geologic deposits exposed throughout TUSK to determine how the springs and marshes that attracted the animals responded to climate change in the past.
Footprints made in muddy ash during Kilauea's 1790 eruption are reminders that people experienced the largest explosive eruption in Hawai‘i in 1,000 years. More than 80, and possibly several hundred, people were killed by the eruption soon after the footprints were made.
Reston, Virginia, was founded 47 years ago & Europeans first settled in the National Capital region 403 years ago. This human footprint can't compare to the dynamic Earth history of this region, extending back as early as 1,180 million years ago and continuing today. For over 120 years, USGS has studied and mapped the region revealing a rich and diverse geologic past....
A trio of USGS scientists has been involved in the excavation and study of a major animal and plant fossil discovery in Snowmass Village, Colo., which provides more than 100,000 years of vegetation and climate records for the area. This recent find includes Columbian mammoths, mastodons, extinct bison, Ice Age deer, and a 9-foot ground sloth, and the USGS team is studying...
Listen to hear the answer.
Listen to hear the answer.
Fossilized Jiang Hanichthys, an extinct fish that lived from the Cretaceaous to 100 million years ago. Item originally from Hubai Province, China.
Fossilized Jiang Hanichthys, an extinct fish that lived fromthe Cretaceaous to 100 million years ago. Item originally from Hubai Province, China.
Trilobite fossil, an extinct marine invertebrate. Item originally from Alnif, Morocco.
A fossilized Trilobite, Phacops rana africana, an extinct marine invertebrate. Item originally from Alnif, Morocco.
Colonies of fossil star coral (Montastraea annularis), still in growth position, exposed in a road cut about 3 meters above sea level (Muhs, D.R., Simmons, K.R., Schumann, R.R., and Halley, R.B., 2011, Sea-level history of the past two interglacial periods: New evidence from U-series dating of reef corals...