http://www.sisterworlds.com/ 2026-04-29T10:00:47+00:00 http://www.sisterworlds.com/ http://www.sisterworlds.com/lib/tpl/dokuwiki/images/favicon.ico text/html 2021-09-28T15:48:18+00:00 http://www.sisterworlds.com/doku.php?id=earth:geohammers:b_bce_events&rev=1632844098&do=diff Billions of Years BCE Events Before Common Era (BCE) events more than a billion years ago. Columbia Supercontinent, 1.5B BCE Third supercontinent, sometimes called Nuna-Rodinia, breaks up. It's formation may have caused a cessation in tectonic activity, leading to nearly a billion years without orogeny (no mountain forming from 1.8B to 0.8B years) based on europium content in zircon crystals. text/html 2021-09-28T15:48:18+00:00 http://www.sisterworlds.com/doku.php?id=earth:geohammers:ce_events&rev=1632844098&do=diff CE Events Common Era (CE) events; CE replacing AD in most calendar events. Tunguska Event, 1908 An asteroid or a comet is believed to have detonated well above the earth's surface in Siberia; the event went off with the power of several nuclear weapons, splaying out trees and laying them down for a considerable area. Some believe that the impact was caused by a Beta Taurid comet fragment. Because the region was never really mapped before-hand, and was so isolated, remote, and unpopulated, t… text/html 2021-09-28T15:48:18+00:00 http://www.sisterworlds.com/doku.php?id=earth:geohammers:geohammers&rev=1632844098&do=diff GeoHammers How have geological events shaped the course of human history? The GeoHammers are cataclysms that affect earth at various times. These are real world events, documented throughout the geological record. CE means 'Common Era', usually a substitute for AD; BCE means 'Before Common Era', usually a substitute for BC. The GeoHammers are listed in reverse chronological order; most recent events first, most ancient events last. Several non-GeoHammer events (such as the flooding of the … text/html 2021-09-28T15:48:19+00:00 http://www.sisterworlds.com/doku.php?id=earth:geohammers:home&rev=1632844099&do=diff Geohammers While called 'geo' hammers for things that strike the earth, the section could just as well be called biogeochemohammers. The sections detail various biological, geological, and chemical alterations in earth that have affected life as we know it. text/html 2022-05-20T22:46:09+00:00 http://www.sisterworlds.com/doku.php?id=earth:geohammers:k_bce_events&rev=1653086769&do=diff Before Common Era (BCE) Events Thousands of years before Common Era (BCE) events; BCE replacing BC in most calendar events. Okmok Volcano, 43 BCE Aleutian Island volcano that caused crop failures in the Roman Republic and the Pharaonic Egypt, ushering in a new age in the Mediterranean region. text/html 2022-12-25T17:55:15+00:00 http://www.sisterworlds.com/doku.php?id=earth:geohammers:m_bce_events&rev=1671990915&do=diff BCE Events (Millions of Years) Before Common Era (BCE) events more than a million years ago. Ancestral Bottleneck, 1.2M BCE Genome research with the Alu gene indicates human ancestors were an endangered species roughly 1.2 million years ago, with a breeding pool of as little as 18,500 individuals. Worse, the condition might have persisted for nearly a million years, indicating how fragile our early development as a species may have been.