Can Mimosa pudica remember harmless drops

Mimosa plants can remember harmless drops for a month

1 month

Mimosa plants normally fold their leaves when disturbed. After being dropped harmlessly many times, they stopped folding in response to the drops but still reacted when shaken. A month later, they still showed this learned difference.

Writing may have started as an accounting system

Some of the earliest writing from Mesopotamia recorded quantities of goods such as grain and livestock. Its symbols were initially better suited to keeping accounts than recording conversations. Over centuries, the system developed ways to represent spoken language. One of humanity's most important inventions may have begun with the practical problem of tracking who owned what.

Black-hole evaporation creates an information puzzle

Hawking radiation seems to allow a black hole to disappear without returning the information about what originally fell into it. Quantum mechanics says information should not simply vanish. This clash with the usual description of black holes creates the black-hole information paradox.

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Can Mimosa pudica remember harmless drops

Mimosa plants can remember harmless drops for a month

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