Biological evolution is the heritable change in characteristics of biological populations over successive generations, driven by mechanisms such as mutation, recombination, genetic drift, gene flow, and natural and sexual selection. It operates through changes in allele frequencies within gene pools, constrained and shaped by developmental, physiological, and ecological contexts. Evolutionary processes generate adaptation, diversification, and extinction, producing hierarchical patterns from microevolutionary shifts within populations to macroevolutionary dynamics among lineages. At the molecular level, evolution involves sequence variation, genomic rearrangements, and changes in gene regulation, which collectively underlie phenotypic diversity and the emergence of complex biological organization.
Long before the dawn of modern parenting, animals laid eggs and moved on, leaving their progeny to fend for themselves. Now, a study published in Nature uncovers one of the elegant ways evolution transformed neglect into ...
Evolution
Jul 8, 2026
0
79
New research finds that the "silent" mutant male crickets of Hawaii, first observed more than 20 years ago, have now become well established across the Hawaiian islands, and that the reproductive challenges caused by a lack ...
Plants & Animals
Jul 8, 2026
0
5
A new international study led by researchers at the University of Oulu, Finland, shows that wolves living in different parts of the world are not anatomically identical. Their skulls differ in shape and size according to ...
Plants & Animals
Jul 7, 2026
0
11
The evolutionary paths that created snatching forelimbs in insects multiple times moved in a similar direction but didn't end at a single solution. Kobe University research is pioneering a study of how organs with similar ...
Evolution
Jul 7, 2026
1
15
Hummingbirds make bromeliad plants split into new species twice as fast as other pollinators do, scientists at the University of Reading have found. The research team gathered records of which animals pollinate 403 types ...
Plants & Animals
Jul 6, 2026
0
70
A new study, published July 6, 2026, in the journal Nature Communications, suggests that two of the best-known trends in human evolution—brain growth and the reduction in the size of the face and jaw—may be far less attributable ...
Evolution
Jul 6, 2026
1
1400
A major transition in evolution is the shift from asexual to sexual reproduction in early organisms. But why would a yeast cell, which usually reproduces asexually, choose to mate with a very different partner in times of ...
Cell & Microbiology
Jul 6, 2026
0
11
Arguably one of the most curious ancient human relatives is Homo floresiensis, a 3-foot-tall species that lived on the Indonesian island of Flores and has been nicknamed "hobbit" for its diminutive stature. Even though they ...
Zoraptera, also known as angel insects or ground lice, are tiny termite-like insects generally found underneath bark or in decaying wood. The Zoraptera group includes a few dozen known insect species that closely resemble ...
Humans and great apes have been giggling in similar ways since branching off the evolutionary tree, a new study suggests.
Plants & Animals
Jul 5, 2026
0
42
