Eggs from girls and from older women show higher rates of errors in chromosome number.

Cellular innards can reorganize themselves to form structures similar to cells.

Groups of corals release all of their eggs and sperm once a year, but the timing of their spawning is under threat from climate change.

The unborn chicks translate auditory alarms from adult birds into quaking vibrations.

Insect eggs can take any shape at almost any size, refuting explanations for their dimensions based on geometric scaling laws or on relationships between egg traits and adult traits.

The awards for comical but practical scientific discovery also include cannibalism and self-colonoscopy.

Osprey numbers are recovering after a drop in contaminants in the Delaware Estuary.

Bigger, older mothers produce disproportionately more eggs than their smaller counterparts do.

A new 3-D model plumbs the molecular intricacies of eggshell composition.