selenelion total lunar eclipse sunrise

A fully eclipsed Moon can appear at sunrise

During a total lunar eclipse, the Sun and fully eclipsed Moon can appear above opposite horizons at once, just after sunrise or before sunset. Air bends their light, making both appear higher in the sky. This sight is called a selenelion, not a separate celestial event.

Fluent answers alone do not prove understanding

In John Searle's Chinese room thought experiment, a person who does not know Chinese follows written rules for choosing Chinese symbols and gives convincing answers. From outside, the answers can look intelligent even though the person does not understand them. The example asks whether correct language use alone proves understanding.

Two virus strains can mix parts to create new combinations

Some viruses divide their genetic material into separate pieces. If two strains infect the same cell, pieces from both can end up together in new virus particles. The offspring can therefore have combinations of traits that neither parent strain had.

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selenelion total lunar eclipse sunrise

A fully eclipsed Moon can appear at sunrise

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