An insight from Crows, smarter than you think | John Marzluff | TEDxRainier

Q: What does Crows, smarter than you think | John Marzluff | TEDxRainier say about Animals?

Because their cerebral hemispheres are less interconnected, many birds can put one hemisphere into a sleep state while the other remains active for vigilance, enabling unihemispheric sleep without losing environmental awareness.

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.

The Gulf Stream Explained

Army ant swarms generally avoid fighting each other because a clash between two lethal social armies would likely cause mutual annihilation, so natural selection favors passing, retreating, or other avoidance behaviors to prevent catastrophic losses.

The World War of the Ants – The Army Ant

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.

The Gulf Stream Explained

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.

Nature's internet: how trees talk to each other in a healthy forest | Suzanne Simard | TEDxSeattle

In the last ice age, massive meltwater floods diluted North Atlantic surface salinity and stalled deepwater sinking, which reduced heat transport and triggered rapid, widespread cooling across the northern hemisphere.

The Gulf Stream Explained

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 Gulf Stream Explained

Deep sinking between Greenland, Norway, and Iceland sustains northward surface flow because cooled, saltier surface water becomes dense and plunges in deepwater 'chimneys', and that downward pull draws in new surface water which drives the Gulf Stream.

The Gulf Stream Explained

Large-scale polar melt can weaken or halt North Atlantic deepwater formation because the influx of fresh meltwater lowers surface salinity and density, preventing the sinking that drives the overturning circulation and its heat transport.

The Gulf Stream Explained

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