ultraviolet flower patterns attract pollinating insects

Some flowers show patterns humans cannot see

Some flowers have ultraviolet patterns that human eyes cannot see. Many insects can see them, and the patterns can guide pollinators toward the flower. To the plant, these invisible signals may matter more than the colors humans notice.

Submarines can navigate without GPS

An inertial navigation system works out a submarine’s position from its motion sensors, without outside information once aligned. Weather and jamming do not disrupt it. But small errors build over time, so the system needs occasional position fixes.

Plastic waste could become hydrogen and graphene

Researchers have demonstrated a way to heat polyethylene—the plastic used in many bags and containers—so it breaks down into hydrogen gas and graphene, a form of carbon just one atom thick. The approach could turn waste plastic into two useful materials, although scaling it up remains a challenge.

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ultraviolet flower patterns attract pollinating insects

Some flowers show patterns humans cannot see

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