The detection of low quantities of alkaloids in putatively nontoxic species of poison frogs sheds light on early evolutionary stages of chemical defense in animals.

Reduced lung myofibroblast proliferation is a unifying feature in multiple models of developmental emphysema and inhibition of myofibroblast proliferation is sufficient to cause this pathology.

The double helix actin network surrounding the mitochondrial sheath of the sperm midpiece undergoes structural changes prior to the motility cessation during sperm-egg fusion.

Intact and local emotional biological motion exerted distinct influences on pupil responses, wherein the emotional modulation observed in intact biological motion is linked to individual autistic traits.