Well, having one great grandson is a great happiness and joy - having two great grandsons just doubles the profound and immense happiness and delight! Actually, life is much better by having two great grandsons, and it also brings joy to the world. This book gives details about this, with many pictures.It is also a good occasion to remember and celebrate great personalities who significantly contributed to our civilization. From Euclid, to the founder of modern bacteriology Koch, from the great painters Leonardo da Vinci, Michelangelo and Rembrandt, to the celebrated inventor Edison, from the famous over 4,580 years old Great Pyramid of Giza, to the unforgettable first man on the Moon, we have many distinguished people and events mentioned in this book, with many attractive and historic photographs. This book brings a rainbow of useful information, which will try to bring more serenity and optimism for all.We wish everybody Happy New Year 2026, with good health, peace, freedom, no arms, good education, good economy, harmony, and prosperity for all!