you could explain the variation between the species by invoking just four events of trait evolution. As this example illustrates, descendants of an ancestral lineage tend to share common traits ...

Cretaceous-era global heat likely caused a genetic split between Northern and Southern Hemisphere lampreys, offering new ...

Darwin's great insight, and the unifying principle of biology today, is that all species are related to one another like sisters, cousins, and distant kin in a vast family tree of life.

Twins are pretty rare, accounting for just 3% of births in the U.S. these days. But new research shows that for primates 60 ...

it would be great to eventually give it a formal species name." Even though there's uncertainty surrounding where the creature sits on the gorgonopsian family tree, its discovery helps scientists ...

As new fossils continue to be uncovered and added to the human family tree, new dating techniques and climate data are providing a more accurate picture of the conditions in which our ancient ...

New research suggests at least some key distinctions date back earlier than previously estimated, hinting that modern and ...

The epaulette shark’s ability to “walk” on land gives it a distinct survival advantage and traces its lineage back to the ...

Galactus is the sixth 'Devourer of Worlds' in a long lineage - part of a 'species' that makes major changes in each cycle of ...

The Chinese paddlefish belongs to an ancient lineage of paddlefish that has been around for at least 100 million years. But in early 2020, a study concluded that the species has recently gone ...

ZSI scientists discover new Indo-Burmese pangolin species diverged from Chinese pangolin 3.4 million years ago, highlighting ...

Spinal cord injury (SCI) remains one of the most devastating medical conditions, severely impacting quality of life and often ...