Content by The Scientist

These 4-D ultrasound scans of fetuses of smoking (top) and non-smoking (bottom) mothers point to developmental delays in the former group.

Adenosine is altered in 60 percent of common squid (Doryteuthis pealeii) RNA transcripts.

Scientists have identified differences in protein expression in the cells that lead the way to heal wounds (green) and those that follow.

Brazil's coconut flower mushroom (Neonothopanus gardneri) controls its bioluminescence with a temperature-regulated circadian clock.

Young crabs, like this one in the megalopa stage of development, closely resemble 150-million-year-old fossilized larvae found in southwestern Germany.

A velvet worm (Epiperipatus acacioi) unfurls its folded mouth papillae—one of which is shown here—to squirt an oscillating jet of slime for prey capture and self-defense. (Scale bar = 100 microns)

The lesser clover (Trifolium dubium) accounted for 46 percent of the 221 plants sent in by Irish gardeners who were asked to identify the species most likely to represent the shamrock in a 1988 survey.

The cross-section of a rat's spine shows its axons (red), synapses (green), and motor neurons (blue).

Thanks to everyone who participated in this year's survey. Please check back in November for the results.

A juvenile leatherback sea turtle (Dermochelys coriacea) weighing 475 pounds was stranded this week at the Yawkey-South Island Preserve, rehabilitated at the South Carolina Aquarium, and released into the wild yesterday.

Fossils of a 2-meter-long, 480-million-year-old, filter-feeding ancestor of insects and crustaceans, thought to be the one of the largest of its kind, were recently found in Morocco.

Like sunflowers and snail shells, the spiraled proboscis of a butterfly conforms to the Golden Ratio.

Changes to light-reflecting guanine nanocrystals help chameleons quickly change hues.

There are more than 8,000 known species of marine worm, including the unidentified specimen shown here at 20x magnification.

A microscopic cross-section of an orchid root shows its nutrient-ferrying stele and the surrounding cortex.