The standard cosmological model ($\Lambda$-CDM) predicts that galaxies are built through hierarchical assembly on timescales$^{1,2}$. Milky Way, like other disc galaxies, underwent violent mergers and accretion of small satellite in its early history. Thanks to Gaia-DR2$^3$ spectroscopic surveys$^4$, the stellar remnants such have been identified$^{5-7}$. chronological dating events is crucial ...

When do children become aware of themselves as differentiated and unique entity in the world? When and how do they become self-aware? Based on some recent empirical evidence, 5 levels of self-awareness are presented and discussed as they chronologically unfold from the moment of birth to approximately 4-5 years of age. A natural history of children's developing self-awareness is proposed as wel...

The development of intraperitoneal shunting systems is presented chronologically and a review is made of the wide variety of intraperitoneal complications which have occured to date.