Technology without heavier elements

The theory of Late Heavy Bombardment says that approximately 4 billions of years ago, something disturbed the orbits of asteroids in the Kuiper belt, which caused extremely heavy bombardment of Earth by asteroids. This probably brought many heavy elements to Earth's surface. The heavy elements that were here previously, during the Earth's formation, sank to the core when the Earth was liquid which made them out of reach. In other words, if there was no Late Heavy Bombardment, the surface of Earth might have been almost without elements much heavier than silicon. (Iron, gold, silver, platinum and others would be extremely rare.)

My question: If humans developed the same way they did, what kind of technology would be achievable almost without elements much heavier than silicon?

posted about 9 years ago

Irigi‭

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