DNA nanotechnology self-assembling structures

DNA can be a building material, not just genetic information

DNA strands naturally recognize and attach to matching strands. DNA nanotechnology uses this property to make DNA assemble itself into designed two- and three-dimensional shapes. In this case, DNA is used as construction material rather than as genetic instructions.

The Sun and Moon nearly match in size

The Sun and Moon appear nearly the same size in Earth’s sky because the Sun is about 400 times wider but also about 400 times farther away. This alignment allows both total and annular solar eclipses.

Ravens may hide food based on what another raven can see

Ravens protect hidden food when a stronger rival can watch them. They also protect it when they can hear the rival nearby through a small opening but cannot see it directly. This suggests they may keep track of what another raven is able to see.

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DNA nanotechnology self-assembling structures

DNA can be a building material, not just genetic information

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