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The 19th century biologist’s drawings, tainted by scandal, helped bolster, then later dismiss, his biogenetic law.

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Time-lapse imaging shows the immune cells transferring chemical signals during pigment pattern formation in developing zebrafish.

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image: Infographic: How the Zebrafish Got Its Stripes

Infographic: How the Zebrafish Got Its Stripes

By | May 1, 2017

Immune cells called macrophages shuttle cellular messages in the skin.

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The lungs of extremely premature lambs supported in a closed, sterile environment that enables fluid-based gas exchange grow and develop normally, researchers report.

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image: Image of the Day: Giant Shipworm

Image of the Day: Giant Shipworm

By | April 19, 2017

Kuphus polythalamia is a worm-like mollusk that can reach up to 155 cm in length, is encased in a hard, tusk-like shell, and lives in sulfur-rich mud.

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image: Image of the Day: Stop Signals

Image of the Day: Stop Signals

By | April 17, 2017

Transcytosis, suppression of vesicle traffic across cells, helps reduce permeability in the blood-retinal barrier during development.

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image: Image of the Day: Sonic Snapper

Image of the Day: Sonic Snapper

By | April 12, 2017

By rapidly snapping its large claw shut, the newly discovered pistol shrimp, Synalpheus pinkfloydi, can create enough sonic energy to stun—even kill—small fish.

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image: Image of the Day: Tubular Origins

Image of the Day: Tubular Origins

By | March 23, 2017

Murine neural tubes, with each image highlighting a different embryonic tissue type (blue). The neural tube itself (left) grows into the brain, spine, and nerves, while the mesoderm (middle) develops into other organs, and the ectoderm (right) forms skin, teeth, and hair.

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image: Image of the Day: Lighting Up the Sea

Image of the Day: Lighting Up the Sea

By | March 22, 2017

The Hawaiian bobtail squid (Euprymna scolopes) is a nocturnal predator with a light organ full of bioluminescent bacteria attached to an ink sac, which the animal uses to control the amount of light it releases.

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image: Image of the Day: Whale Watching

Image of the Day: Whale Watching

By | March 8, 2017

Scientists capture the True’s beaked whale (Mesoplodon mirus) on film for the first time.

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