All articles tagged with #ancient earth
Research shows that for about a billion years, Earth's day lasted around 19 hours due to a balance between lunar tidal forces and atmospheric tides, with long periods of stability interrupted by episodes of faster or slower rotation, influencing Earth's climate and oxygen levels over geological time.
Research shows that for about a billion years, Earth's day lasted roughly 19 hours due to a balance between lunar tidal forces and atmospheric tides, creating long periods where day length remained stable before gradually increasing to 24 hours, impacting Earth's climate and oxygen levels.
Geologists have uncovered evidence of a massive tsunami caused by a 35-million-year-old asteroid impact in Chesapeake Bay, with findings from North Carolina revealing tsunami deposits and impact materials, shedding light on the event's far-reaching effects and potential hazards of asteroid collisions.
Researchers using high-resolution techniques have analyzed 3.5 billion-year-old rocks from the Pilbara Craton in Western Australia, revealing new clues about the formation and composition of ancient biomass. The study provides insights into the earliest ecosystems on Earth and suggests that original traces of the first organisms can still be found in extremely old material. The research, published in Precambrian Research, utilized methods such as nuclear magnetic resonance spectroscopy and near-edge X-ray Absorption Fine Structure to analyze carbonaceous particles, shedding light on the history of their deposition and origin.
The Earth has undergone significant changes from ancient to modern times, including the transformation of its atmosphere from hydrogen/helium to nitrogen/oxygen, the development of plate tectonics, the lengthening of its day due to tidal forces, the outspiraling of the Moon to its current distance, a decline in crater-causing impacts, the emergence and transformation of life, and the increasing solar luminosity, which will eventually lead to the boiling away of Earth's oceans in 1-2 billion years.
A new interactive website called Ancient Earth allows users to trace dinosaurs and other prehistoric creatures to their geographic location. Developed by Ian Webster, the website offers a snapshot of life in any city or set of coordinates during prehistoric eras, including the early stages of life for flora and fauna. The tool also reveals fascinating discoveries about modern cities, such as New York, which can be seen covered in glaciers 750 million years ago. The globe pinpoints selected locations and provides information on the creatures that roamed the land. Additionally, the website highlights the existence of supercontinents and the recent discovery of Argoland, emphasizing the vastness of Earth's history.
PBS's NOVA series presents "Ancient Earth: Life Rising" in Season 50, Episode 13, exploring the origins and evolution of life on Earth.
A new documentary series called Ancient Earth explores the icy era of Earth's history when the planet was covered in ice from pole to pole, threatening the survival of early complex life. Scientists investigate how life managed to survive and evolve during this global deep freeze, which may have played a role in promoting the evolution and diversification of life towards more complexity. The series aims to showcase the extraordinary story of Earth's transformation throughout its history and highlight the importance of caring for the planet.
New research has revealed a link between ancient atmospheric shifts and the chemistry of Earth's mantle, providing insights into the planet's evolution. The study focused on the Great Oxidation Event (GOE), a period when oxygen levels in Earth's atmosphere rapidly increased, and investigated magmas formed in ancient subduction zones. The findings suggest that sediment recycling played a crucial role in providing atmospheric access to the mantle, leading to increased oxidation of magma and altering the composition of the continental crust. This discovery sheds light on the relationship between Earth's external and internal reservoirs and raises questions about the role of oxygen in shaping the planet's history and the conditions for life.
A new interactive map created by former Google engineer Ian Webster allows users to see where their home city was located during the time of the dinosaurs and other periods of ancient Earth. The map showcases how the continents have shifted over time and how ancient life evolved. The map is built on top of another map made by geologist and paleogeographer Christopher Scotese, creating an easy-to-use tool for visualizing geological models.