Life
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Life
Building the body electric
Eyes can be grown in a frog’s gut by changing cells’ electrical properties, scientists find, opening up new possibilities for generating and regenerating complex organs.
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Life
Eggs have own biological clock
Reproductive cells age independently from the rest of the body, research in worms reveals.
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Humans
DNA highlights Native American die-off
A genetic analysis points to widespread New World deaths after Europeans arrived.
By Bruce Bower -
Life
Vying for the title of World’s Fastest Cell
Scientists film 58 kinds of mobile cells to study movement — and to have a little fun.
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Life
Biology’s big bang had a long fuse
The fossil record’s earliest troves of animal life are the result of more than 200 million years of evolution.
By Susan Milius -
Life
Cretaceous Thanksgiving
A fossilized feathered dinosaur dined on bird not long before its own demise.
By Susan Milius -
Life
DNA to flutter by
The complete genetic instruction book for making monarch butterflies contains information about how the insects manage their long migration to Mexico.
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Life
Unraveling synesthesia
Tangled senses may have genetic or chemical roots, or both.
By Nick Bascom -
Animals
Lost to history: The “churk”
More than a half-century ago, researchers at the Beltsville Agricultural Research Center outside Washington, D.C., engaged in some creative barnyard breeding. Their goal was the development of fatherless turkeys — virgin hens that would reproduce via parthenogenesis. Along the way, and ostensibly quite by accident, an interim stage of this work resulted in a rooster-fathered hybrid that the scientists termed a churk.
By Janet Raloff -
Life
Immune cells function beyond battle
Cells lining the intestines take cues from immune cells and gut bacteria when deciding whether self-defense or metabolism is more important.
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Plants
Flirty Plants
Searching for signs of picky, competitive mating in a whole other kingdom.
By Susan Milius