cómo explicas que, si no hemos visto un dinosaurio, no hemos viajado al espacio exterior, ni hemos visto un corazón o un cerebro humano directamente, aun así, podemos describir y hasta explicar el funcionamiento de estos sistemas

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

The littoral zone. . .