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Spinal cord asymmetries set early hand bias because lateralized gene expression drives more spontaneous movements on one side by about 10 weeks post-conception, and those unequal kicks provide sensory feedback that sculpts cortical motor circuits.
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See all →Large amounts of moondust raining through the atmosphere would convert kinetic energy into heat—potentially heating and even boiling surface waters—while persistent ring shadows and volcanic/meteoric aerosols would reflect sunlight and trigger rapid cooling, so the net climate effect depends on the balance and timing of heating versus sunlight blockage.
Plants that produce caffeine suffer less insect damage because caffeine is toxic to many insects, so caffeine-producing individuals are more likely to survive and reproduce than neighboring plants without it.