Tag

Evolution

All articles tagged with #evolution

biology2 days ago•17 min saved

Life with Intent: Rethinking Biological Agency

Quanta Magazine surveys whether ‘biological agency’—the idea that life acts with goals or reasons—is scientifically productive, weighing mechanistic, gene-centered explanations against views that organisms set proximal goals through context, learning, and interaction with their environment. The piece traces debates from Mayr and Monod to Baldwin’s effect and Lamarck, examines whether agency implies conscious deliberation, and argues for developing a formal, testable theory of agency that could unify biology with development, evolution, and future artificial agents.

via Quanta Magazine|

#agency #biology #evolution

science5 days ago•2 min saved

Light Awakens the Darkness: Blind Cavefish Move More in Illumination

Florida Atlantic University researchers found that the blind Mexican cavefish become more active when exposed to light, a light-evoked photokinesis opposite to surface fish, driven by dopamine signaling and repurposed brain circuits; the behavior appears heritable, offering insights into brain evolution and potential relevance to human neurological conditions.

via BBC Wildlife Magazine|

#cavefish #dopamine #evolution

science8 days ago•3 min saved

Sea Anemone CARDIB Protein Rewrites Viral Defense Strategy

Researchers found that the starlet sea anemone Nematostella vectensis makes a CARDIB protein that normally suppresses certain immune signals, but is essential for mounting an effective antiviral response. CRISPR-edited anemones lacking CARDIB were more vulnerable, while CARDIB-expressing animals survived better in real estuary conditions, suggesting a 648-million-year-old, independently evolved antiviral mechanism with potential implications for medicine.

via Gizmodo|

#antiviral #cardib #evolution

science9 days ago•13 min saved

Ancient hybrid between tomato and a tuberless relative created the potato’s distinctive tuber

Genomic analysis published in Cell (2025) shows the potato lineage arose from an ancient hybrid between a tomato-lineage ancestor and an Etuberosum ancestor about 8–9 million years ago in southern South America, with two key genes (SP6A and IT1) from each parent driving tuber formation; domesticated ~7,000 years ago near Lake Titicaca, the potato is an evolutionary novelty that could inform modern breeding using wild relatives.

via Space Daily|

#agriculture #evolution #genetics

science10 days ago•4 min saved

Sea Anemones Reveal an Antiviral Brake Essential to Fight Viruses

Researchers found that sea anemones use CARDIB, a protein that suppresses antiviral defenses, yet is essential for mounting an effective response—revealing a different immune pathway from humans' MAVS. CRISPR removal made animals highly susceptible to infection, and outdoor mesocosm tests showed the pathway matters in nature, indicating multiple, independent antiviral strategies evolved across animals.

via ScienceDaily|

#antiviralimmunity #cardib #evolution

science10 days ago•13 min saved

Sharks trace back to a pre-forest Earth, about 450 million years ago

New fossil and geological evidence place the shark lineage around 450 million years ago in the Middle Ordovician, predating the first broad leaves and forests on land, showing that modern sharks are the result of a long marine evolution rather than unchanged fossils, with land plants and forests arising much later in Earth’s history.

via Space Daily|

#evolution #forests #ordovician

science10 days ago•5 min saved

Egypt’s 17-Million-Year-Old Ape Fossil Reframes the Origins of Modern Apes

Scientists describe Masripithecus moghraensis, a new Early Miocene ape from Wadi Moghra, Egypt—the first definite North African ape—reconciling a geographic gap and suggesting North Africa was a key cradle for crown Hominoidea. The jaw shows a versatile, fruit-based diet with the ability to process harder foods. Bayesian analyses place Masripithecus closer to living apes than East African Miocene apes, positioning North Africa/Middle East as the likely home of the common ancestor of all living apes and highlighting the region as a corridor for dispersal into Europe and Asia. More fossils from the area could further illuminate ape origins.

via SciTechDaily|

#anthropology #evolution #miocene

science13 days ago•5 min saved

Evolution's Shadow: Aging's Cost and the Path to Healthier Longevity

A recent review tests the ‘selection shadow’ idea—that natural selection weakens after reproduction, allowing late-life mutations to accumulate and drive aging. By analyzing large human genetic datasets and cross-species aging data, the researchers find evidence for weaker late-life selection and identify conserved aging pathways, suggesting that interventions targeting upstream aging processes could compress morbidity and improve healthspan, not just extend lifespan.

via ScienceAlert|

#aging #evolution #genetics

science13 days ago•4 min saved

Devonian Giant Scorpion Rewrites Early Arthropod Size Story

New imaging of 19th‑century fossils confirms Praearcturus gigas was about 1 meter long, making it the largest known scorpion and pushing the appearance of giant arthropods back by tens of millions of years. Lived around 415 million years ago in what is now Britain, before forests, suggesting size may have stemmed from ecological opportunity and limited competition rather than just high oxygen. Some fossils hint the animal spent time in water, highlighting a life at the land–sea boundary during early terrestrial ecosystems.

via SciTechDaily|

#devonian #evolution #giantarthropods

science14 days ago•2 min saved

Laughs Across Evolution: Humans and Apes Share Similar Giggle Rhythm

Researchers reanalyzed decades-old recordings of ape laughter and compared them to new footage of children's laughs, finding that humans and great apes share similar rhythmic patterns in their giggles, suggesting laughter evolved from a common ancestor about 15 million years ago. While human laughter can be faster and more context-dependent, its core rhythm remains similar to apes, highlighting laughter as a social bonding tool. The study, published in Communications Biology, underscores the need for more cross-species recordings to illuminate what makes human laughter unique.

via ScienceAlert|

#animal-behavior #evolution #humans

science15 days ago•5 min saved

Tickles Across Species: Ape and Human Laughter Share a Shared Rhythm

A study analyzing tickled human children and juvenile great apes (orangutans, gorillas, bonobos, chimpanzees) found they produce similar, evenly spaced laughter rhythms, suggesting conserved primate vocal control dating back about 15 million years; laughter becomes more variable during social play due to movement.

via Nature|

#apes #evolution #humans

science15 days ago•2 min saved

Ape Chuckles Trace the Rhythm of Laughter Through Evolution

A new study of chimpanzees, gorillas and other great apes (including human children) shows laughter across the group shares a regular rhythmic pattern; nonhuman apes tend to fixed tempos, while humans vary tempo and timing with context, suggesting laughter evolved as a flexible social signal across species.

via The New York Times|

#animal-behavior #evolution #laughter

science17 days ago•7 min saved

Ancient land vertebrates conquered land without a tadpole phase

A new Science study of embolomere fossils and early tetrapodomorphs finds no evidence of the tadpole larval stage in the life cycles of early land vertebrates, implying direct development (bypassing metamorphosis) was common, challenging the long-held view that amphibian-like metamorphosis aided the water-to-land transition.

via Ars Technica|

#embolomeres #evolution #fossils

science18 days ago•5 min saved

Sloth DNA Reveals Genetic Backups Behind Their Slow Metabolism

A comparative genetic study of the two-toed sloth suggests that jumping genes and mitochondrial/metabolic gene networks form backup systems that help sustain the animal’s ultra-low-energy lifestyle, shedding light on how cells manage energy and potentially informing human health, aging, and tissue preservation.

via ScienceAlert|

#evolution #metabolism #mitochondria

science19 days ago•7 min saved

Youth-Boost Gene Carries Hidden Longevity Cost in Killifish

Researchers identify vgll3 as a gene that speeds growth and early maturation in African turquoise killifish, boosting reproductive success but increasing aging and tumor risk later, providing strong evidence for antagonistic pleiotropy and offering insights for human aging and cancer research.

via SciTechDaily|