Physics and Astronomy · Astronomy and Astrophysics

Origins and Evolution of Life

DNA May Carry Three Overlapping Layers of Information, Study Proposes

A Zenodo article proposes that DNA carries three overlapping information layers: one that specifies amino acids, another that affects how quickly proteins are made and folded, and a third linked to molecular stability and helix shape. An analysis of five human genes found broad compositional patterns at sites where the code allows multiple DNA sequences, with BRCA1 as a reported exception.

3 days ago·6 views

Physics & Space

Earth’s earliest clues and lab chemistry suggest no single place made life

A review of evidence from Earth’s Hadean era and experiments on prebiotic chemistry finds that no single environment on early Earth appears to meet all the conditions needed for life to begin. Instead, the paper argues that multiple, connected processes across different settings likely helped build and stabilize the molecules that later became biology.

1 month ago·24 views