An underwater plant forms oxygen bubbles as it photosynthesizes.
Time-lapse photography shows how chick ectoderm develops over the course of 16 hours.
This artwork by Lynn Scurfield accompanied our feature on prenatal cannabis exposure.
Brain organoid cross-section
Researchers grow organoids that display electrical activity, making them potentially useful for studying epilepsy.
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.
A hotspot of meningeal lymphatic vessels (green) at the base of the rodent skull, pictured among red blood vessels, is specialized to drain cerebrospinal fluid.
In September, environmental activists took to the streets in advance of United Nations climate summits.
Right whale pair
This mother and calf were spotted on February 7, 2019—the first baby to appear during the 2018-19 breeding season.
Artificial snake bite
Microneedles inspired by snake fangs could deliver liquid medicine.
Turtles may have some control over what sex they develop into.
Emily Makowski is an intern at The Scientist. Email her at email@example.com.