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Life Origin

This tag is associated with 37 posts

New techniques boost understanding of how fish fins became fingers

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How and why single cell organisms evolved into multicellular life

Origin of life: Temperature gradients within pores in rock could have separated primitive biopolymers

Oldest DNA sequences may reveal secrets of ancient animal ancestors

Researchers at Universities of Leicester and Warwick discover early conserved DNA sequences from almost 700 million years ago. 700 million year-old DNA sequences from ancient animals have been unearthed by researchers at the Universities of Leicester and Warwick, shedding new light on our earliest animal ancestors and how they influenced modern species — including the … Continue reading

Life on Earth likely started 4.1 billion years ago, much earlier than scientists thought

UCLA geochemists have found evidence that life likely existed on Earth at least 4.1 billion years ago — 300 million years earlier than previous research suggested. The discovery indicates that life may have begun shortly after the planet formed 4.54 billion years ago. The research is published in the online early edition of the journalProceedings … Continue reading

New synthesis method imitates the way molecules were formed at the dawn of life on Earth

Researchers from the Institute for Advanced Chemistry of Catalonia (IQAC-CSIC), with support from the Nuclear Magnetic Resonance Service of the Universitat Autònoma de Barcelona (UAB) have developed a method for synthesising organic molecules very selectively, by assembling simple molecules and using an enzyme from E. coli (FSA: D-fructose-6-phosphate aldolase), which acts as a biocatalyst. This … Continue reading

Origins of life: New model may explain emergence of self-replication on early Earth

When life on Earth began nearly 4 billion years ago, long before humans, dinosaurs or even the earliest single-celled forms of life roamed, it may have started as a hiccup rather than a roar: small, simple molecular building blocks known as “monomers” coming together into longer “polymer” chains and falling apart in the warm pools … Continue reading

Missing link in evolution of complex cells discovered

In a new study, published in Nature, a research team led from Uppsala University in Sweden presents the discovery of a new microbe that represents a missing link in the evolution of complex life. The study provides a new understanding of how, billions of years ago, the complex cell types that comprise plants, fungi, but … Continue reading

Ancient rocks show life could have flourished on Earth 3.2 billion years ago

A spark from a lightning bolt, interstellar dust, or a subsea volcano could have triggered the very first life on Earth. But what happened next? Life can exist without oxygen, but without plentiful nitrogen to build genes — essential to viruses, bacteria and all other organisms — life on the early Earth would have been … Continue reading

Organism hasn’t evolved in more than 2 billion years

The greatest absence of evolution ever reported has been discovered by an international group of scientists: a type of deep-sea microorganism that appears not to have evolved over more than 2 billion years. But the researchers say that the organisms’ lack of evolution actually supports Charles Darwin’s theory of evolution. The scientists examined sulfur bacteria, … Continue reading

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