The tilt of the Earth in its orbit From a heliocentric point of view, the Earth revolves around the Sun, thus determining its orbital plane. It takes 1 year to complete a full turn. At the same time, it turns on itself (around its axis of rotation inclined at 23.45° with respect to the plane of its orbit) in 24 hours, with a movement similar to that of a top. We also know that the planets (...)

Introduction: Pavlov discovering how the nervous system works It was however by studying the role of the nervous system in the functioning of these glands by carrying out animal experiments (Pavlov was an immense experimenter who only theorized after having personally validated his hypotheses in the laboratory) that he was led to discover the existence of “conditional reflexes”, which he (...)

We will never have drunk as much, they say, as under prohibition. Our exorcists, far from suppressing the forbidden demons of philosophy, have provoked a flood of astrologies in all directions, all tendencies. Cardan has made small… It seems late to stop the wave, to reify the dikes of reason against this excess of philosophy. Height of threats to the future of our barriers, their builders (...)

From March equinox to December solstice March equinox ▶ the Sun leaves the ecliptic sector of Pisces and enters Aries. It is then vertical to the Earth’s equator. ▶ everywhere on Earth, the Sun rises in the east and sets in the west, while the lengths of days and nights are practically equal (12 hours each). ▶ throughout the northern hemisphere it is the time of the year when the days (...)

The ecliptic and the constellations The ecliptic is the apparent trajectory described each year by the Sun around the Earth. By definition, the Sun is always exactly on the ecliptic. However, the Sun occupies different positions north or south of the Earth’s equator, depending on the time of year. The equinoxes correlate with the moment when the Sun is in the plane of the Earth’s equator. The (...)