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Genetic Bottleneck

All articles tagged with #genetic bottleneck

science5 months ago

Nearly Extinct: Humanity's Near-Disaster 1 Million Years Ago

Approximately one million years ago, human ancestors faced a near-extinction, surviving a genetic bottleneck that reduced the population to about 1,280 individuals, likely driven by climate change. This event significantly impacted human evolution, including the fusion of two chromosomes into human chromosome 2, which distinguished humans from other primates. Following environmental improvements and technological advances, humans gradually recovered and expanded globally, demonstrating resilience through adversity.

via Indian Defence Review|
#chromosome-fusion#climate-change#extinction-event
science7 months ago

Nearly Extinct: Humanity's Near-Wipeout 1 Million Years Ago

Nearly one million years ago, human populations faced a severe genetic bottleneck, reducing to about 1,280 individuals, likely due to climatic changes, which also coincided with a major chromosomal fusion event that distinguished humans from other primates. Despite this near-extinction, humans recovered and evolved, shaping the course of human history.

via The Daily Galaxy|
#chromosome-fusion#genetic-bottleneck#human-evolution
science7 months ago

New Study Pinpoints When Neanderthals Began to Vanish

A new study in Nature Communications reveals that Neanderthals experienced a severe genetic bottleneck after an initial period of diversity, likely caused by climate change, which contributed to their eventual extinction around 40,000 years ago. The research challenges previous assumptions about their gradual decline and highlights the complex, fragmented nature of human evolution.

via Indian Defence Review|
#climate-change#evolution#fossil-evidence
science1 year ago

"Prehistoric Near-Extinction Sparked Ancient Human Migration"

New research suggests that a genetic bottleneck occurred among our ancestors, likely Homo erectus, around 900,000 years ago, leading to a significant drop in population and genetic diversity. This event may have been triggered by a severe climate change, forcing the survivors to migrate out of Africa and eventually becoming the ancestors of Neanderthals and Denisovans. The study aims to resolve the debate about the timing of this near-extinction event and its impact on human evolution, shedding light on a crucial period in the human family tree.

via IFLScience|
#climate-change#genetic-bottleneck#homo-erectus
science2 years ago

The Toba Volcano: A Near-Extinction Event?

The Toba catastrophe theory suggests that a supervolcano eruption around 74,000 years ago on the Indonesian island of Sumatra may have caused a global catastrophe that nearly wiped humans off the planet, leaving only a few thousand individuals. While this theory has been disputed, evidence shows that humankind underwent a "genetic bottleneck" around 60,000 years ago, indicating a sudden population crash. Despite this, humans bounced back and the past 40,000 years of human history have seen significant technological growth and cognitive development, leading to the advent of agriculture and civilizations. Today, the human population stands at 8 billion.

via IFLScience|
#climate-change#evolution#genetic-bottleneck