Travelling at speeds close to that of light, spacemen lived at an accelerated pace. When one of the twin boys left the starship, he grew older while his twin in space barely aged. So the starship twin left the ship to find what happened to his brother who was aging away on earth.

Here are two early stories by the well known SF Author Robert Silverberg. The Happy Unfortunate was published first in Amazing Stories in 1957 and explores the angst caused when the human race reaches into space but at the cost of needing to breed a new species; specialized 'spacers' who can withstand the tremendous rigors of acceleration. The Hunted Heroes was published in Amazing stories a year earlier, in 1956. It is a futuristic story that holds great hope for the resilience of the human race after the war destroys most of the world.

Why did everybody step off the ship in this strange valley and promptly drop dead? How could a well-equipped corps of tough spacemen become a field of rotting skeletons in this quiet world of peace and contentment? It was a mystery Peter and Sherri had to solve. If they could live long enough! [from the Judas Valley]Originally published in Amazing Stories, October 1956

Of all the natural sciences there is not one which offers such sublime objects to the attention of the inquirer as does the science of astronomy. From the earliest ages the study of the stars has exercised the same fascination as it possesses at the present day. Among the most primitive peoples, the movements of the sun, the moon, and the stars commanded attention from their supposed influence on human affairs. From the days of Hipparchus down to the present hour the science of astronomy has steadily grown...

Robert Sterling Yard (February 1, 1861 – May 17, 1945) was an American writer, journalist, and wilderness activist. Born in Haverstraw, New York, Yard graduated from Princeton University and spent the first twenty years of his career in the editing and publishing business. In 1915, he was recruited by his friend Stephen Mather to help publicize the need for an independent national park agency. Their numerous publications were part of a movement that resulted in legislative support for a National Park Service (NPS) in 1916...

How do you tell apart a parrot from a carrot? A plover from a clover? A bay from a jay? Although there are several ways of differentiating, R. W. Wood’s use of pun and rhyme is one of the most entertaining!

Roger North, son of Dudley North, 4th Baron North, was a successful member of the bar and later member of parliament. But he had wide ranging interests from architecture to music. He has an avid collector of books and is best known as the biographer of the North family. Here we sample his interest in raising fish. He presents fifteen short sketches of esculent fish, and a longer essay as "A Discourse of Fish and Fish Ponds." - Summary by Larry Wilson

Though little is known about its author, this is considered the first vegan cookbook ever written. At the time of its composition, the Vegetarian Society and other advocates of vegetarian diets were engaged in a debate about the inclusion of dairy and eggs in one's regime. This text declares, from the title to the footnotes, that the best diet is free from all animal products. The arguments span historical, physical, ethical, aesthetic, and economic considerations and conclude with practical advice that stands the test of time. An essential text for those interested in vegetarianism and animal rights.

Doubleday chronicles the history of everyday inventions that form the foundation of technology now common through the world. While some of the inventions are no longer used, each example shows how inventors contributed to technology through perseverance, inspiration and clever observations. In each chapter, he gives a clear, understandable background of the technology.Many of the now outdated inventions may have inspired later inventions by meeting emerging demands. For example, Edison's filament bulb is now being phased out by more efficient CFL's, but Edison's contribution to indoor lighting likewise removed the need for inefficient gas-burning lamps...

The author provides the listener with anecdotes from her life of her experiences with birds. She describes their habits and antics, their food favorites, their preferred nesting practices, and what can be done to encourage birds to become "neighbors". She also provides instructions on making a birdhouse.

Samuel Phillips Day traces the history of tea from Asia to England, exploring some of the romance of this treasured drink and its place in British culture. - Summary by Larry Wilson

If this book were written today, it would be called "The Story of the World's Rubbish".That may not sound a promising subject for a book, but we are taken on a journey all over the world (and beyond) to explain the many varieties of dust and refuse - animal, vegetable and mineral - how it is made both by man and by nature, what happens to it, and why we need it. We find that recycling is nothing new: man has been doing it for centuries, and nature has been doing it for billions of years. As every schoolboy knows, 'matter is neither created nor destroyed', so it stands to reason that every particle of it must be somewhere...

Frontinus' Stratagems is a collection of examples of military stratagems from Greek and Roman history, which the author comments based on his own experience as a general in Germania. Many of the stories he tells can also be found in other Roman authors like Valerius Maximus and Livy. His most famous work however is De aquaeductu, The Aqueducts of Rome, an official report to the emperor on the state of the aqueducts of Rome, in two books. It presents a history and description of all the nine aqueducts that provided the water-supply of Rome in the first century, as well as information about the laws relating to its use and maintenance, and the quality of water delivered by each.

Professor Freud developed his system of psychoanalysis while studying the so-called borderline cases of mental diseases, such as hysteria and compulsion neurosis. By discarding the old methods of treatment and strictly applying himself to a study of the patient's life he discovered that the hitherto puzzling symptoms had a definite meaning, and that there was nothing arbitrary in any morbid manifestation. Psychoanalysis always showed that they referred to some definite problem or conflict of the person concerned...

This is a volume of short stories by the famous Arthur Conan Doyle.

The electric telegraph, together with the railway-train and the steamship, constituted the three most conspicuous features of late 19th century civilization. Indeed, it may be truly said that the harnessing electricity to the service of man for human communication has effected a change in political, commercial, and social relations, even more complete than that wrought by steam locomotion. This is the story of how the electric telegraph cable was laid across the floor of the Atlantic from Newfoundland to Ireland. - Summary by modified from the introduction

A biographical summary of the pre-eminent men of Britain grouped by profession. The extensive survey draws from information including college graduation, reputation during career, fellowships, and even known relatives. Includes discussions on findings and observations as well as referenced appendices. - Summary by Leon Harvey

Francis Galton, credited with the discovery of identification by fingerprinting, also took a long term interest in the study of biometrics. In this book, many different faculties, both observable and measurable are discussed in length and methods of collecting data suggested. In addition, casual observations from personal memoirs, and drawing similar cases from other reputable sources are also compared. A wide variety of topics are mentioned, including differences in appearance within family members, to subtle habits and emotional responses comparing humans and animals are mentioned in a series of chapter length essays. - Summary by Leon Harvey

A history of the advances in chemistry, in the fields of inorganic, organic and physical chemistry from the mid-nineteenth century through the early 1900s. Included are brief biographical sketches of some early pioneers in the field such as Mendeleev, Liebeg, Williamson, Dewar and others. Chapters covering the discovery of new elements, the developing understanding of structure, properties and reactivity, the beginnings of practical organic synthesis and the early work on stereoisomerism show how the way was paved for the discoveries that followed in the 20th century...

The World of Sound consists of six lectures delivered before a juvenile audience at the Royal Institution, Christmas 1919. The Royal Institution Christmas Lectures are a series of lectures on a single topic, which have been held at the Royal Institution in London each year since 1825, except several years during the Second World War. The lectures present scientific subjects to a general audience, including young people, in an informative and entertaining manner. Michael Faraday initiated the first Christmas Lecture series in 1825, at a time when organised education for young people was scarce...

Stanley G. Weinbaum is best known for his short story “A Martian Odyssey” which has been influencing Science Fiction since it was first published in 1934. Weinbaum is considered the first writer to contrive an alien who thought as well as a human, but not like a human. A Martian Odyssey and its sequel are presented here as well as other Weinbaum gems including 3 stories featuring the egomaniacal physicist Haskel van Manderpootz and his former student, playboy Dixon Wells.

Lively descriptions of the people, places, and customs that the author encounters as he attempts to retrace the steps of the early Spanish conquistadores in the Americas: Columbus, Cortez, Pizarro, Balboa, Coronado.