In this special edition from Scientific American, we have collected articles about the latest developments in the field of human evolution—written by the experts who are leading the investigations.

We invite you to explore the pages that follow, to learn more about that fascinating first chapter in everybody’s family history.

Here's a delightful collection of American riddles and puzzles, illustrated with wonderfully quirky cartoons. 101 American English Riddleswill amuse you for hours - while giving insight into American idioms and humor. Harry Collins has arranged 101 riddles into nine sections based on the type of riddle, including: Riddles with words with more than one meaning, Riddles that trick you, Riddles that use numbers and logic, Riddles that use idioms, and more! And he has turned them over to illustrator Joe Kohl, whose eye-grabbing cartoons give you clues to the answers - or lead you astray!

You'll find help everywhere you need it, including explanations of wordplays, idioms, and culture. Where helpful, there are also dialogues or natives that show how the language in the riddle is used in everyday American English.

This book will help nonnative speakers of English improve their use of English at its most entertaining - while native speakers will enjoy seeing these favorite riddles illustrated with such wit and whimsy. 101American English Riddles will have you scratching your head in puzzlement or slapping your thigh with laughter!

A Convenient and Complete Thesaurus

This thesaurus is an essential tool for everyone who needs to write quickly, clearly, and well. A convenient and complete thesaurus for school, work, and home, The Concise Oxford American Thesaurus includes more than 15,000 main entries and over 350,000 synonyms, sample sentences and phrases for virtually every sense. Synonym Studies that show the subtle differences in meaning among a group of easily confused words are included, as well as the Oxford exclusive Language Guide, with information about grammar, usage, punctuation, frequently misspelled words, and much more.All Oxford American dictionaries use an easy-to-use respelling system to show how entries are pronounced. It uses simple, familiar markings to represent common American English sounds.

Enrich Your Writing and Speech

• More than 350,000 synonyms and antonyms;
• Synonym Studies section included to give helpful guidance for practise usage ;
• Usage Notes that give helpful information on correct English.

The American Psychological Association has established a style that it uses in all of the books and journals that it publishes. Many others working in the social and behavioral sciences have adopted this style as their standard as well.

APA's style rules and guidelines are set out in a reference book called The Publication Manual of the American Psychological Association.

A Companion to American Indian History captures the thematic breadth of Native American history. Twenty-five original essays written by leading scholars, both American Indian and non-American Indian, bring a comprehensive perspective to a history that in the past has been related exclusively by Euro-Americans.

The essays cover a wide range of Indian experiences and practices, including contacts with non-Indians, religion, family, economy, law, education, gender, and culture. They reflect new approaches to Native America drawn from environmental, comparative, and gender history in their exploration of compelling questions regarding performance, identity, cultural brokerage, race and blood, captivity, adoption, and slavery. Each chapter also encourages further reading by including a carefully selected bibliography.

Intended for students, scholars, and general readers of American Indian history, this timely book is the ideal guide to current and future research.