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Scientists Debate the Origin of Cell Types in the First Animals
Theories about how animals became multicellular are shifting as researchers find greater complexity in our single-celled ancestors.
What’s in a Name? Taxonomy Problems Vex Biologists
Researchers struggle to incorporate ongoing evolutionary discoveries into an animal classification scheme older than Darwin.
Bacterial Complexity Revises Ideas About ‘Which Came First?’
Contrary to popular belief, bacteria have organelles too. Scientists are now studying them for insights into how complex cells evolved.
The Body’s Clock Offers a Rhythmic Target to Viruses
Viruses and other parasites may sync with their host’s biological clock — or reset it — to gain an advantage.
Ancient DNA Yields Snapshots of Vanished Ecosystems
Surviving fragments of genetic material preserved in sediments allow scientists to see the full diversity of past life — even microbes.
In Ecology Studies and Selfless Ants, He Finds Hope for the Future
For more than six decades, the influential biologist Edward O. Wilson has drawn connections between evolution, ecology and behavior, often sparking controversies inside and outside of science.
Rapid Oxygen Changes Fueled an Explosion in Ancient Animal Diversity
Skyrocketing animal diversity a half-billion years ago was linked to spikes and dips in marine oxygen levels, according to a detailed geological study.
Icefish Study Adds Another Color to the Story of Blood
The rainbow of pigments that animals use for blood illustrates a central truth of evolution.