Insight by Nature
Stressed or diseased trees send chemical warning signals through mycorrhizal networks, which causes neighboring trees to upregulate defense enzymes and become more resistant, effectively creating a communal immunization effect.
Every card on Korva is an insight someone saved from a podcast or video they loved.
More from @nature's Picks
See all →Ocean currents shape large-scale weather and climate because they carry warm water and the heat it contains from the equator toward the poles, redistributing solar energy and altering atmospheric temperature patterns.
Ravens time risky maneuvers—such as dodging passing cars—to minimize actual harm while excluding competitors, so calculated physical risk-taking can secure exclusive access to food.
The Gulf Stream acts like a massive heat pump for Europe because it transports vast volumes of warm seawater and releases that heat into the atmosphere, substantially raising regional temperatures compared with similar latitudes.
By looping sensory signals between the forebrain and thalamus instead of sending them straight to motor outputs, birds can re-evaluate impulses and modify intended movements before committing to action.
The global thermohaline conveyor is driven mainly by density differences because temperature and salinity set seawater density—colder, saltier water becomes dense and sinks while lighter water rises, producing a deep, slow circulation largely independent of winds.
The amygdala attaches emotional valence to places and sensory cues, so perception is shaped by prior feelings which then bias the bird's behavioral responses toward approach or avoidance.
Because only about 5% of the seafloor has been accurately mapped, vast unmapped regions remain where deeper, undiscovered depressions could exist.
Mother trees preferentially allocate more carbon to genetically related seedlings because they can direct resources through fungal links to kin, especially after injury, effectively passing support and fitness benefits down their genetic lineage.