Ponder, if you will ...Why are tennis balls fuzzy? How come birds don''t tip over when they sleep on telephone wires?What makes yawning contagious?Why, oh why, do roosters have to crow so early in the morning?

Pop-culture guru David Feldman demystifies these topics and so much more in When Do Fish Sleep? -- the unchallenged source of answers to civilization''s most baffling questions. Part of the Imponderables® series and charmingly illustrated by Kassie Schwan, When Do Fish Sleep? arms readers with the knowledge about everyday life that encyclopedias, dictionaries, and almanacs just don''t have. And think about it, where else are you going to get to the bottom of why Mickey Mouse has only four fingers?

Why does an "X" stand for a kiss?Which fruits are in Juicy Fruit® gum?Why do people cry at happy endings?Why do you never see baby pigeons?

Pop-culture guru David Feldman demystifies these topics and so much more in Why Don''t Cats Like to Swim? -- the unchallenged source of answers to civilization''s most perplexing questions. Part of the Imponderables® series, Feldman''s book arms readers with information about everyday life -- from science, history, and politics to sports, television, and radio -- that encyclopedias, dictionaries, and almanacs just don''t have. Where else will you learn what makes women open their mouths when applying mascara?

The tenth book in David Feldman’s bestselling Imponderables® series, packed with even more answers to perplexing questions and solutions to everyday mysteries

Every day, we are confronted with innumerable small mysteries, which puzzle and confound. In his latest book, David Feldman answers 100 new and even more perplexing questions about food, popular culture, the human body, science, and more, such as:

Like the other books in the Imponderables series, Do Elephants Jump? is in a question/answer format, with questions sent in by readers and fans of the series, and answers painstakingly researched and offered in Feldman’s trademark humorous style.

This tenth book in the series is complete with a master index to all the Imponderables® books, and charming illustrations by longtime collaborator Kassie Schwan. 

The English language is filled with familiar words that, when one thinks about them, are downright peculiar: cooties, doozies, and heepie-jeebies; finks and funks; mugwumps and muumuus; deep six and cloud nine. There''s only one pundit to solve these and other riddles of our spoken tongue: David Feildman, who in his bestselling Imponderables™ book and Why Do Clocks Run Clockwise? has established himself as the unchallenged expert on answering and unanswerable.

Word Imponderables™ have always been favorites with Feldman''s legions of fans, and in Who Put the Butter in Butterfly? he gets to the source of all the mysteries surrounding our curious vocabulary. Why do we mid our Ps and Qs and not our Vs and Ws? Which Toms lent their names to Peeping Tom, Tom Collins, and tommy gun. How does a Weasel go "pop" -- and why for that matter? And who are the Joneses we''re supposed to be keeping up with?

Who Put the Butter in Butterfly? is a reference book you can''t afford to be without. So don''t beat around the bush , and don''t wait until the eleventh hour to until the jig is up. This is compulsive reading for anyone incurable curious about the idiosyncrasies fo the language.

Are you the type of person who stays up nights wondering how they get the paper tag into Hershey''s Kisses? Or why portholes are round?

Even if you don''t lose sleep over such matters, you have to admit that such questions are, well, worthy of consideration.

Here, from David Feldman, creator of the Imponderables® series, are the latest questions on the minds of his devoted readers and fans. No question from his readers is too small or obscure for Feldman to tackle. From the return of red M&Ms (they are back, if you''ve missed it) to new-car smell, the answers to life''s little mysteries are dissected in these pages.

Although it''s all done in great fun, there is also an educational edge to the answers, as Feldman ferrets out top experts in diverse fields to come up with his entertaining answers. And their answers may surprise you—from the detailed physics involved in why cans of Diet Coke float but regular Coke doesn''t, all the way to why they put crinkly paper into pairs of men''s socks (but only one sock, not both).

Complete with drawings by longtime Imponderables® illustrator Kassie Schwan, and a special section updating answers to questions in previous books in the series, this eleventh book of Imponderables® is sure to entertain the thousands of Feldman fans who have purchased over 2 million copies to date. Prepare to be delighted!

The fifth book in David Feldman’s bestselling Imponderables® series, packed with even more answers to perplexing questions and solutions to everyday mysteries

Culled from the thousands of letters submitted by desperate fans, Do Penguins Have Knees? answers 100 new and even more perplexing questions about food, popular culture, the human body, science, and more, such as:

With over 190 irresistible entries and charming illustrations by longtime Imponderables® collaborator Kassie Schwan, Do Penguins Have Knees? is an Imponderables® classic.

Ponder, if you will ...What is the difference between a kit and a caboodle?Why don''t people get goose bumps on their faces?Where do houseflies go in the winter?What causes that ringing sound in your ears?

Pop-culture guru David Feldman demystifies these topics and so much more in Why Do Clocks Run Clockwise? -- the unchallenged source of answers to civilization''s most nagging questions. Part of the Imponderables® series and charmingly illustrated by Kassie Schwan, Why Do Clocks Run Clockwise? challenges readers with the knowledge about everyday life that encyclopedias, dictionaries, and almanacs just don''t have. And think about it, where else are you going to get to the bottom of why hot dogs come ten to a package while hot dog buns come in eights?

Ponder, if you will ...Why are tennis balls fuzzy? How come birds don''t tip over when they sleep on telephone wires?What makes yawning contagious?Why, oh why, do roosters have to crow so early in the morning?

Pop-culture guru David Feldman demystifies these topics and so much more in When Do Fish Sleep? -- the unchallenged source of answers to civilization''s most baffling questions. Part of the Imponderables® series and charmingly illustrated by Kassie Schwan, When Do Fish Sleep? arms readers with the knowledge about everyday life that encyclopedias, dictionaries, and almanacs just don''t have. And think about it, where else are you going to get to the bottom of why Mickey Mouse has only four fingers?

In gathering the most fascinating questions asked about sports and entertainment into a handy Gem format, pop culture guru David Feldman demystifies these and much more in Imponderables®: Fun and Games. Providing you with information you can''t find in encyclopedias, dictionaries, or almanacs, Fun and Games is a fun look at the little things that make life so interesting.

The seventh book in David Feldman’s bestselling Imponderables® series, packed with even more answers to perplexing questions and solutions to everyday mysteries

Instead of the aspirin bottle, reach for the most soothingly informative of David Feldman’s Imponderables® books, and find answers to the riddles that, whether you realize it or not, have been obsessing you since childhood, such as:

With more than 100 irresistible entries—submitted by his loyal Imponderables® readers—charming illustrations, and more than 100,000 copies sold in combined editions, How Does Aspirin Find a Headache? is an Imponderables® classic.

The sixth book in David Feldman’s bestselling Imponderables® series, packed with even more answers to perplexing questions and solutions to everyday mysteries

Culled from the thousands of letters submitted by desperate fans, the questions in Are Lobsters Ambidextrous? would have overwhelmed a lesser authority than David Feldman. 

With 141 irresistible entries, charming illustrations by longtime Imponderables® collaborator Kassie Schwan, and almost 100,000 copies sold in combined editions, Are Lobsters Ambidextrous? is an Imponderables® classic.

In gathering the most fascinating questions asked about science into a handy Gem format, pop culture guru David Feldman demystifies these and much more in Imponderables®: Science. Providing you with information you can''t find in encyclopedias, dictionaries, or almanacs, Science is a fun look at the little things that make life so interesting.

The Third Edition of this classic compendium, Vitamin D, is the most comprehensive, authoritative reference available in the field. In two volumes and over 100 chapters, the editors and authors have marshaled all currently available data on the basic mechanisms, normal physiology and effects on disease of Vitamin D; they have laid out for the reader up-to-date and expert information on the role of vitamin D in health and many disorders. With new chapters on multiple cancers, this complete reference work is essential for anyone working in endocrinology, osteology, bone biology, or cancer research.

Volume One chapters cover the chemistry and metabolism of vitamin D, role in mineralization, other target organs, and general physiological effects. Volume Two is more clinically oriented addressing deficiency problems (including diagnosis, interactions in the endocrine system, and involvement in malignancies). Volumes One and Two are now sold separately in print. Volume One ISBN: 9780123870353; Volume Two ISBN: 9780123870346.

Ponder, if you will ...Why are tennis balls fuzzy? How come birds don''t tip over when they sleep on telephone wires?What makes yawning contagious?Why, oh why, do roosters have to crow so early in the morning?

Pop-culture guru David Feldman demystifies these topics and so much more in When Do Fish Sleep? -- the unchallenged source of answers to civilization''s most baffling questions. Part of the Imponderables® series and charmingly illustrated by Kassie Schwan, When Do Fish Sleep? arms readers with the knowledge about everyday life that encyclopedias, dictionaries, and almanacs just don''t have. And think about it, where else are you going to get to the bottom of why Mickey Mouse has only four fingers?

Why does an "X" stand for a kiss?Which fruits are in Juicy Fruit® gum?Why do people cry at happy endings?Why do you never see baby pigeons?

Pop-culture guru David Feldman demystifies these topics and so much more in Why Don''t Cats Like to Swim? -- the unchallenged source of answers to civilization''s most perplexing questions. Part of the Imponderables® series, Feldman''s book arms readers with information about everyday life -- from science, history, and politics to sports, television, and radio -- that encyclopedias, dictionaries, and almanacs just don''t have. Where else will you learn what makes women open their mouths when applying mascara?

The tenth book in David Feldman’s bestselling Imponderables® series, packed with even more answers to perplexing questions and solutions to everyday mysteries

Every day, we are confronted with innumerable small mysteries, which puzzle and confound. In his latest book, David Feldman answers 100 new and even more perplexing questions about food, popular culture, the human body, science, and more, such as:

Like the other books in the Imponderables series, Do Elephants Jump? is in a question/answer format, with questions sent in by readers and fans of the series, and answers painstakingly researched and offered in Feldman’s trademark humorous style.

This tenth book in the series is complete with a master index to all the Imponderables® books, and charming illustrations by longtime collaborator Kassie Schwan. 

The English language is filled with familiar words that, when one thinks about them, are downright peculiar: cooties, doozies, and heepie-jeebies; finks and funks; mugwumps and muumuus; deep six and cloud nine. There''s only one pundit to solve these and other riddles of our spoken tongue: David Feildman, who in his bestselling Imponderables™ book and Why Do Clocks Run Clockwise? has established himself as the unchallenged expert on answering and unanswerable.

Word Imponderables™ have always been favorites with Feldman''s legions of fans, and in Who Put the Butter in Butterfly? he gets to the source of all the mysteries surrounding our curious vocabulary. Why do we mid our Ps and Qs and not our Vs and Ws? Which Toms lent their names to Peeping Tom, Tom Collins, and tommy gun. How does a Weasel go "pop" -- and why for that matter? And who are the Joneses we''re supposed to be keeping up with?

Who Put the Butter in Butterfly? is a reference book you can''t afford to be without. So don''t beat around the bush , and don''t wait until the eleventh hour to until the jig is up. This is compulsive reading for anyone incurable curious about the idiosyncrasies fo the language.

Are you the type of person who stays up nights wondering how they get the paper tag into Hershey''s Kisses? Or why portholes are round?

Even if you don''t lose sleep over such matters, you have to admit that such questions are, well, worthy of consideration.

Here, from David Feldman, creator of the Imponderables® series, are the latest questions on the minds of his devoted readers and fans. No question from his readers is too small or obscure for Feldman to tackle. From the return of red M&Ms (they are back, if you''ve missed it) to new-car smell, the answers to life''s little mysteries are dissected in these pages.

Although it''s all done in great fun, there is also an educational edge to the answers, as Feldman ferrets out top experts in diverse fields to come up with his entertaining answers. And their answers may surprise you—from the detailed physics involved in why cans of Diet Coke float but regular Coke doesn''t, all the way to why they put crinkly paper into pairs of men''s socks (but only one sock, not both).

Complete with drawings by longtime Imponderables® illustrator Kassie Schwan, and a special section updating answers to questions in previous books in the series, this eleventh book of Imponderables® is sure to entertain the thousands of Feldman fans who have purchased over 2 million copies to date. Prepare to be delighted!

The fifth book in David Feldman’s bestselling Imponderables® series, packed with even more answers to perplexing questions and solutions to everyday mysteries

Culled from the thousands of letters submitted by desperate fans, Do Penguins Have Knees? answers 100 new and even more perplexing questions about food, popular culture, the human body, science, and more, such as:

With over 190 irresistible entries and charming illustrations by longtime Imponderables® collaborator Kassie Schwan, Do Penguins Have Knees? is an Imponderables® classic.

Ponder, if you will ...What is the difference between a kit and a caboodle?Why don''t people get goose bumps on their faces?Where do houseflies go in the winter?What causes that ringing sound in your ears?

Pop-culture guru David Feldman demystifies these topics and so much more in Why Do Clocks Run Clockwise? -- the unchallenged source of answers to civilization''s most nagging questions. Part of the Imponderables® series and charmingly illustrated by Kassie Schwan, Why Do Clocks Run Clockwise? challenges readers with the knowledge about everyday life that encyclopedias, dictionaries, and almanacs just don''t have. And think about it, where else are you going to get to the bottom of why hot dogs come ten to a package while hot dog buns come in eights?

Ponder, if you will ...Why are tennis balls fuzzy? How come birds don''t tip over when they sleep on telephone wires?What makes yawning contagious?Why, oh why, do roosters have to crow so early in the morning?

Pop-culture guru David Feldman demystifies these topics and so much more in When Do Fish Sleep? -- the unchallenged source of answers to civilization''s most baffling questions. Part of the Imponderables® series and charmingly illustrated by Kassie Schwan, When Do Fish Sleep? arms readers with the knowledge about everyday life that encyclopedias, dictionaries, and almanacs just don''t have. And think about it, where else are you going to get to the bottom of why Mickey Mouse has only four fingers?

In gathering the most fascinating questions asked about sports and entertainment into a handy Gem format, pop culture guru David Feldman demystifies these and much more in Imponderables®: Fun and Games. Providing you with information you can''t find in encyclopedias, dictionaries, or almanacs, Fun and Games is a fun look at the little things that make life so interesting.

The seventh book in David Feldman’s bestselling Imponderables® series, packed with even more answers to perplexing questions and solutions to everyday mysteries

Instead of the aspirin bottle, reach for the most soothingly informative of David Feldman’s Imponderables® books, and find answers to the riddles that, whether you realize it or not, have been obsessing you since childhood, such as:

With more than 100 irresistible entries—submitted by his loyal Imponderables® readers—charming illustrations, and more than 100,000 copies sold in combined editions, How Does Aspirin Find a Headache? is an Imponderables® classic.

The sixth book in David Feldman’s bestselling Imponderables® series, packed with even more answers to perplexing questions and solutions to everyday mysteries

Culled from the thousands of letters submitted by desperate fans, the questions in Are Lobsters Ambidextrous? would have overwhelmed a lesser authority than David Feldman. 

With 141 irresistible entries, charming illustrations by longtime Imponderables® collaborator Kassie Schwan, and almost 100,000 copies sold in combined editions, Are Lobsters Ambidextrous? is an Imponderables® classic.

In gathering the most fascinating questions asked about science into a handy Gem format, pop culture guru David Feldman demystifies these and much more in Imponderables®: Science. Providing you with information you can''t find in encyclopedias, dictionaries, or almanacs, Science is a fun look at the little things that make life so interesting.

The Third Edition of this classic compendium, Vitamin D, is the most comprehensive, authoritative reference available in the field. In two volumes and over 100 chapters, the editors and authors have marshaled all currently available data on the basic mechanisms, normal physiology and effects on disease of Vitamin D; they have laid out for the reader up-to-date and expert information on the role of vitamin D in health and many disorders. With new chapters on multiple cancers, this complete reference work is essential for anyone working in endocrinology, osteology, bone biology, or cancer research.

Volume One chapters cover the chemistry and metabolism of vitamin D, role in mineralization, other target organs, and general physiological effects. Volume Two is more clinically oriented addressing deficiency problems (including diagnosis, interactions in the endocrine system, and involvement in malignancies). Volumes One and Two are now sold separately in print. Volume One ISBN: 9780123870353; Volume Two ISBN: 9780123870346.