Overview
Complex life forms on Earth might survive for an additional 500 million years beyond prior projections. This updated timeline concerns the period before the Sun's anticipated expansion transforms Earth into an environment suitable only for microbial life.
Research Context
The long-term habitability of Earth is intrinsically linked to the evolutionary trajectory of the Sun. As the Sun progresses through its life cycle, its luminosity and size are predicted to increase. This process is expected to gradually alter Earth's climate and atmospheric conditions, eventually rendering the planet inhospitable to complex multicellular organisms. Earlier models and understandings have established a general timeframe for this environmental shift, after which only simpler life forms, such as microbes, would be able to endure the altered conditions.
Findings
A recent assessment suggests an extended horizon for the viability of complex life on Earth. The new estimation indicates that the planet could remain capable of supporting life more intricate than microbes for approximately 500 million years longer than previously calculated. This extension pushes back the point at which Earth is expected to become inhospitable to complex life due to the Sun's expansion.