Insight by Nature
Some crows solve novel physical problems by mentally sequencing possible actions and intentionally modifying a tool, which indicates internal planning and insight rather than only reactive trial-and-error.
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See all →As external pressure rises with depth, mechanical stresses on submersible hulls and windows increase and can exceed design limits, causing cracks or catastrophic structural failure during extreme dives.
Tight-knit human social networks create resilience because members exchange care, assistance, and emotional support when someone weakens, functioning analogously to how organisms exchange resources and signals in ecological networks to sustain the group.
Diving beyond about 100 meters risks fatal decompression sickness because rapid pressure changes force dissolved gases (mainly nitrogen) out of solution into bubbles that damage tissues and blood vessels.
Ecosystem resilience emerges from many species interactions because those interactions create feedbacks and cycles (like nutrient cycling and predation) that sustain function; removing key parts can break feedbacks and flip the system into degraded, hard-to-reverse stable states.
Sperm whales often bear sucker marks and scars because violent encounters with giant squid at depth leave physical traces on their bodies, revealing predator–prey battles in the deep sea.
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.
Sunlight can't reach past roughly 1,000 meters because light attenuates as the water column absorbs and scatters photons, so deeper ocean layers remain in permanent darkness.
Removing seemingly competitive species like birch breaks mutualistic fungal and nutrient exchanges in the mycorrhizal network, which reduces tree health and undermines the overall resilience of the forest.