Παππάς Α. Σπυρίδων

@spappasa

PhD Astrophysicist. Ret. Colonel 🇬🇷🇨🇾🇮🇱🇫🇷🇺🇸 #Christian #Family #Country "Μέγα τὸ τοῦ νοῦ δύναμις· ἑαυτὸν γὰρ δύναται νοεῖν" http://eCity.gr - Real Time News

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Science

Jonathan the 194-year-old giant tortoise is helping researchers study extreme longevity

A Science Advances study says researchers sequenced the genome and methylome of Jonathan, an Aldabra giant tortoise that Science Advances described as the oldest known living land animal, to look for genetic and epigenetic clues to his lifespan.

12 Sources, 11d ago, updated 11d ago

Dorsal scute of an Aldabra giant tortoise shell. Recent longevity studies have used comparative genomic analysis to reveal gene markers with the potential to slow aging and inhibit cancer in long-lived species. Vaisvil et al. report the first genome sequence of the 194-year-old Aldabra giant tortoise Jonathan, the oldest known living land animal. DNA methylome analysis showed that comparatively lower-entropy regions in Jonathan’s methylome were linked to higher-fidelity gene transcription and more efficient DNA repair, energy production, and RNA processing. These findings support a model for aging where efficient energy production supports robust DNA repair, thus preserving genomic integrity and potentially contributing to improved longevity.

Credit: Stephen Clark

Science

Earth microbes can live in simulated Enceladus conditions

A separate post says ice grains freeze slowly and shatter in Enceladus’s vents, explaining the chemical diversity of its ocean spray.

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2 Sources, 20d ago, first seen 20d ago

Science

NASA's Roman Space Telescope captures its first test images

Live Science reports that Roman's first images show hundreds of stars as blurry green rings. Its Wide Field Instrument has not been fully focused yet.

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2 Sources, 23d ago, first seen 23d ago

Trump is reportedly establishing an ‘AI Force’

eCity, citing Techgear, says Trump is also calling for AI development without restrictions.

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1 Source, 32d ago, first seen 32d ago

Featured in

Jonathan the 194-year-old giant tortoise is helping researchers study extreme longevity

Earth microbes can live in simulated Enceladus conditions

NASA's Roman Space Telescope captures its first test images

Trump is reportedly establishing an ‘AI Force’

Featured in

Jonathan the 194-year-old giant tortoise is helping researchers study extreme longevity

Earth microbes can live in simulated Enceladus conditions

NASA's Roman Space Telescope captures its first test images

Trump is reportedly establishing an ‘AI Force’