At midday in C3 plants, what is happening in the leaf of a plant?

This is giving me a headache i have asked others and they don’t know it either

The answer is overmatching

The soviet union beat the us to the first successful launch, with the october 4, 1957, orbiting of sputnik 1, and later beat the us to have the first human in earth orbit, yuri gagarin, on april 12, 1961. the "race" peaked with the july 20, 1969, us landing of the first humans on the moon with apollo 11