eBooks de Ciencias, página 17 de 1764

Un análisis claro y penetrante del frágil engranaje que sostiene nuestra alimentación y de los desafíos urgentes para transformarlo.«Uno de los pensadores más importantes del mundo sobre la teoría de

Y si un mundo mejor fuera posible… y estuviera más cerca de lo que creemos?En una época marcada por la división, la desconexión y la crisis medioambiental, este libro nos lleva a descubrir, de la man

Leyendo a Euclides fue escrito en 1947 con el objetivo de atraer la atención de lectores no matemáticos hacia el estudio de conceptos fundamentales de la geometría y la filosofía. Tras analizar el pensamiento socratico y deducir interesantes conclusiones de tipo filosofico, Levi introduce al lector en el analisis exhaustivo de los inmortales Elementos. La presente edicion incluye el ensayo biografico "Beppo Levi, Italia y Argentina en la vida de un matematico", de Laura Levi, hija de Beppo."La logica de la geometria de Euclides, en particular su sistematicidad y coherencia, sigue suscitando admiracion. No debiera extrañar entonces que un matematico moderno como Beppo Levi le haya dedicado un estudio profundo, aunque sin la pesada carga erudita habitual. Ni es de extrañar que, a su vez, este libro del matematico italoargentino despierte la curiosidad de lectores contemporaneos. ¿Que resulto del encuentro de Euclides con Levi a la vuelta de veintidos siglos? Lo averiguaran quienes lean este libro tan original como claro. Aprenderan a ver a Euclides, e incluso a su posible maestro, Platon, con ojos modernos. Y aprenderan, si no lo saben ya, los deleites de la conversacion con muertos sin recurrir a trucos espiritistas". Del prologo de Mario Bunge

Este libro surge de una serie de talleres y seminarios organizados por la Universidad Panamericana como parte de la Cátedra Interamericana Laudato si. A partir de la encíclica del papa Francisco, el texto aborda la crisis socioambiental como una manifestacion de una crisis mas profunda: la perdida de la dimension sagrada del mundo y la desconexion del ser humano con Dios, la naturaleza y el projimo.Dividida en tres apartados, en el primero se establece un marco teologico y filosofico sobre la crisis ecologica, analizando la critica del Papa a la modernidad y proponiendo una etica renovada. Luego, explora la "cultura del descarte" desde distintas perspectivas, incluyendo la discapacidad, la discriminacion de genero y la exclusion de los ancianos, ademas de plantear una economia mas humana y sostenible. En el tercer apartado se hace un llamado a la esperanza, rescatando enseñanzas de los pueblos originarios, reflexionando sobre la vida urbana sostenible y promoviendo una vision de la humanidad como cocreadora de un futuro mejor.A traves de diversas voces academicas y estudiantiles, este libro busca propiciar un cambio de paradigma y fomentar un compromiso real con la ecologia integral, respondiendo al llamado del papa Francisco a cuidar nuestra casa comun con una educacion transformadora.

Cerrad los ojos. Imaginad un espacio sin límites. Imaginad los movimientos de una partida de ajedrez perfecta. Imaginad que el número 4 pudiera decirse de muchas maneras diferentes. Imaginad los acontecimientos infinitesimales que pueden conducir a que estalle la revolucion en un pais. Imaginad una tribu que, por no saber contar, no planea nada que se prolongue mas de un dia. Imaginad a Shakespeare descubriendo el numero cero y las dimensiones de una ausencia. Imaginad que pudierais leer un libro de una infinidad de maneras distintas.Me llamo Daniel Tammet, y soy sinestesico: percibo los numeros con colores y siluetas. En mi cabeza, contar es como pasear por un bosque. Tengo diagnosticado, ademas, el sindrome del sabio: puedo aprender un idioma en una semana, y recitar decimales del numero pi durante cinco horas (por eso me dieron un Guinness). De pequeño resolvi que, si conseguia reunir suficientes recuerdos y someterlos a un patron estadistico, podria predecir el comportamiento de mi madre. Los numeros primos poseen para mi la belleza de la poesia. No entendi lo que me sucedia hasta que conoci a Rain Man (al de verdad). Cada mañana me siento en mi escritorio y me pregunto: ¿y si...?

¿Que sintieron los grandes cientificos de la historia en el momento en que alcanzaron sus grandes descubrimientos? ¿Como llegaron al instante magico en el que sus predicciones se hicieron realidad? Este increible viaje de la prediccion a la prueba nos transporta desde laboratorios ubicados en Paris y Cambridge hasta el frente ruso devastado por la guerra, pasando por bunkeres construidos bajo reactores nucleares y enormes tuneles subterraneos en la frontera suizo-francesa. Desde el electromagnetismo hasta las ondas gravitacionales de Einstein y el escurridizo neutrino de Wolfgang Pauli, el aclamado escritor y cientifico Marcus Chown nos acompana en un recorrido impresionante por los avances de la fisica moderna, deteniendose en ese instante magico en el que las matematicas y la fisica, de la mano de sus mas brillantes representantes, cambiaron para siempre la historia de la ciencia.

Un viaje esperanzador por la capacidad de la naturaleza para adaptarse que nos enseña a enfrentar los desafíos actuales. Durante casi cuatro mil millones de años, la vida en la Tierra ha encontrado nuevas formas de adaptarse, reproducirse y prosperar, transformandose para responder a las condiciones de cada epoca. Pero el impacto humano sobre el planeta y la amenaza potencialmente devastadora del cambio climatico han puesto a prueba esa capacidad de adaptacion como nunca antes. Aun asi, la vida siempre encuentra un camino. Animales, plantas e insectos siguen afrontando el desafio y continuan adaptandose, reproduciendose y prosperando incluso en un entorno en rapida transformacion. En su ejemplo quiza encontremos tambien nosotros las claves para cambiar, para detener la destruccion que estamos causando al planeta.En El ingenio de la naturaleza, David Farrier nos invita a un viaje profundo por este mundo natural en constante cambio. Lo que descubrimos en el podria transformarnos. Las formas en que los animales se ajustan al paisaje urbano pueden ayudarnos a diseñar ciudades sostenibles. El estudio de otras inteligencias puede inspirarnos a reinventar nuestras economias. La evolucion bacteriana puede ofrecer soluciones al problema de los residuos. La biologia sintetica podria rescatar especies al borde de la extincion. Y pensar en las escalas de tiempo de la naturaleza puede guiarnos hacia un futuro mejor.La vida en la Tierra esta cambiando; la pregunta es si nosotros seremos capaces de cambiar con ella. ¿Podremos reconstruir el mundo para que toda forma de vida vuelva a prosperar?

«Saborea laexperiencia dequeteestalle la cabeza sinnecesidad dealucinógenos».The GuardianEn octubre de 1927, veintinueve de los científicos más brillantes del mundo se reunieron en el Quinto Congreso

Losing a beloved pet can shatter a heartbut it can also bring a family closer than ever. This deeply emotional and inspiring story explores how the loss of a cherished pet became a powerful turning point for healing, connection, and growth within a family. Through moments of grief, reflection, and shared memories, the narrative reveals how pain transformed into empathy, understanding, and stronger emotional bonds. With honesty and warmth, this book shows how facing loss together can open conversations long left unspoken, strengthen family relationships, and teach resilience in the most unexpected ways. It is a moving reminder that love does not end with goodbyeand that even in sorrow, there is space for unity, compassion, and hope. Perfect for readers seeking comfort, emotional depth, and meaningful life lessons, this story proves that the loss of a pet can leave behind more than sadnessit can leave a legacy of togetherness and emotional strength.

Guilt after losing a pet can be one of the heaviest emotions to carryoften silent, confusing, and deeply painful.This compassionate and emotionally grounding book addresses the unspoken weight of guilt that follows the loss of a beloved pet. Through gentle reflection and emotional clarity, it explores the "what ifs," the regrets, and the self-blame that so many pet lovers experience but rarely talk about. With empathy and understanding, the narrative helps readers recognize that guilt is a natural response to love and lossnot a sign of failure. It guides the heart toward forgiveness, self-compassion, and emotional release, showing how to untangle painful thoughts and replace them with healing perspectives. By reframing memories and honoring the bond shared, this journey encourages readers to move from blame to gratitude, from emotional paralysis to peace. It reminds us that love is not defined by perfection, but by presence, care, and the countless moments shared. This book offers comfort to those struggling to let go of guilt, helping transform inner pain into acceptance and remembrance. Because healing doesnt mean forgettingit means learning to love yourself with the same kindness you once gave your pet. Even after loss, healing is possibleand you dont have to carry guilt alone.

After the devastating loss of a beloved pet , grief can leave life feeling empty and directionless. This deeply moving and inspirational story reveals how profound pain became the starting point for healing, purpose, and transformationboth for one heart in mourning and for the lives that followed .Through honest reflection and emotional resilience, the narrative explores how love does not end with loss, but can be redirected into acts of compassion. By opening the heart again and choosing to adopt, care for, and protect animals in need, grief slowly transforms into hope, connection, and renewed meaning .This book takes readers on an intimate journey through sorrow, guilt, healing, and rediscovery, showing how adoption can be a powerful response to lossnot as a replacement, but as a continuation of love . It highlights the emotional challenges, the unexpected joys, and the quiet moments where brokenness turns into strength.More than a personal story, this is a testament to the healing power of kindness and second chances . It reminds us that even after heartbreak, love can grow againchanging not only the lives we save, but our own forever .

Opening your heart again after loss is one of the hardestand most meaningfuldecisions a pet lover can face. After saying goodbye to a beloved companion, the question of adoption often comes with doubt, guilt, hope, and fear all at once. This heartfelt and thoughtful book explores the emotional journey of understanding grief, honoring memories, and recognizing the signs that you may be ready to welcome a new pet into your life. Through honest reflections and compassionate insights, the story helps readers navigate the delicate balance between mourning what was lost and making space for new love. It shows how adopting after loss is not about replacing a pet, but about continuing a bond rooted in care, healing, and emotional growth. With warmth and sensitivity, this narrative reassures readers that readiness looks different for everyoneand that choosing adoption at the right moment can be a powerful step toward renewal, purpose, and joy.

Losing a beloved pet can leave an image that lingersthe final look, the last moment, the memory that wont fade. This deeply compassionate guide helps you gently face that image and transform it into a source of peace, comfort, and lasting love. Through practical reflections, emotional healing techniques, and heart-centered guidance, this book shows how to navigate grief without suppressing ithonoring your bond while releasing pain. Youll learn how to soften intrusive memories, reframe the final moments with kindness, and reconnect with the joyful essence of your companion. Designed to support anyone mourning a dog, cat, or cherished animal friend, this journey offers clarity when emotions feel overwhelming and hope when loss feels unbearable. Step by step, it helps you move from sorrow to serenity, from heartbreak to gratitude, and from goodbye to a peaceful remembrance that endures. If the final image of your pet still hurts, this book offers a gentle path forwardone that respects your grief, heals your heart, and turns love into calm.

Sometimes the words we never said are the ones that hurt the most.This emotionally healing narrative explores the power of writing a letter to a beloved pet as a therapeutic path through grief, love, and remembrance. Through heartfelt words, memories resurface, emotions find release, and pain slowly transforms into acceptance. The story reveals how putting feelings into words can help process loss, ease guilt, and preserve the unbreakable bond shared with a pet who was more than an animala true family member. Each reflection becomes a step toward emotional clarity, allowing grief to be expressed instead of suppressed.Gentle, comforting, and deeply human, this book shows how a simple letter can become a powerful emotional therapyhelping readers honor their pets legacy, heal the heart, and rediscover peace without forgetting the love that will always remain.

Sometimes, the deepest lessons come from the quietest souls.This heartfelt narrative explores how a profound spiritual connection with a beloved pet became the beginning of a healing missionone that extends far beyond personal grief. Through love, loss, and awakening, this story reveals how an animals presence can guide emotional growth, inner strength, and compassion for others walking the same painful path. As grief unfolds, so does meaning. What begins as a personal journey of remembrance transforms into a source of empathy and purpose, showing how honoring a pets spirit can inspire acts of kindness, emotional support, and connection with people who are also healing broken hearts. With emotional depth and spiritual sensitivity, this book reflects on how animals touch our souls, teach us unconditional love, and continue to guide us even after theyre gone. It gently reminds readers that pain can evolve into purposeand that healing becomes more powerful when shared. This is a story of love that transcends loss, of spirituality born from companionship, and of how one pets legacy can illuminate the path for many othersproving that when we listen with the heart, even goodbye can become a beginning.

The first night without your pet can feel unbearably long silent, heavy, and filled with emotions that arrive all at once. This compassionate guide offers immediate emotional support for those facing the raw, overwhelming hours after losing a beloved companion .With gentle reassurance and practical comfort strategies, the book helps you navigate shock, loneliness, guilt, and sadness when sleep feels impossible and the absence feels too loud . It provides grounding techniques, calming rituals, and soothing reflections designed specifically for the earliest stage of pet loss grief .Readers are guided through ways to honor their pets presence, cope with intrusive thoughts, and survive the night without suppressing emotions or feeling pressured to "be strong" . The focus is not on fixing grief, but on helping you feel less alone during the most vulnerable moment of loss.Tender, validating, and deeply human, this guide reminds you that your pain is real, your bond mattered, and this nighthowever painfulcan be met with compassion and care . You dont have to face it alone.

When a pet is gone without warning, the silence they leave behind can feel overwhelming.This deeply compassionate and insightful book explores the emotional shock of losing a pet suddenly and the intense grief that follows. Through honest reflections and gentle guidance, it helps readers understand their pain, validate their emotions, and find healthy ways to cope with loss that feels unfair and unfinished. With warmth and sensitivity, the narrative addresses feelings of guilt, anger, confusion, and heartbreakshowing that these reactions are natural and shared by many. It offers comfort through emotional awareness, remembrance, and the slow rebuilding of inner strength after an unexpected goodbye. More than a story of loss, this book is a reminder that healing is possible even after sudden heartbreak. It encourages readers to honor their pets life, cherish the love that remains, and move forward at their own paceone gentle step at a time.

Losing a pet can be as heartbreaking as losing a family member and knowing how to offer the right kind of support can make all the difference. This compassionate guide helps friends and family understand pet loss grief and shows how to be truly present during one of the most vulnerable moments in a persons life .With empathy and clarity, the book explains what grieving pet owners are really feeling, what to say (and what not to say), and how small gestures of kindness can provide immense comfort . It gently addresses common mistakes, awkward silences, and well-meaning comments that may unintentionally cause pain, offering practical alternatives rooted in emotional intelligence and care.Readers will discover how to support without minimizing the loss, how to respect different grieving styles, and how to create a safe space for healingwhether the loss is recent or long past . This guide also explores how to help children, partners, and close friends cope with pet loss in healthy and compassionate ways.More than just advice, this book is a reminder that love for a pet is real, grief is valid, and supportwhen offered with understandingcan be profoundly healing . It equips you to show up with kindness, patience, and confidence when it matters most.

Opening your heart to a new pet after loss can feel confusinghope mixed with guilt, excitement tangled with loyalty to the one you loved before. This compassionate guide helps you understand that adopting again is not a betrayal, but a continuation of love.With emotional clarity and gentle guidance, this book shows how to welcome a new companion while honoring the memory of the one who came before. Youll learn how to recognize when youre emotionally ready, how to release fear and comparison, and how to build a new bond without erasing the past.Through thoughtful reflections and practical steps, it explores grief, healing, and renewalhelping you transform love into a living legacy. The journey encourages respect, patience, and emotional balance, allowing space for remembrance and new joy to coexist.If your heart longs to love again but hesitates out of devotion to the past, this book offers reassurance, peace, and permission to begin a new chapterone guided by compassion, gratitude, and enduring love.

Facing a pets terminal illness is one of the most emotionally challenging journeys a guardian can experience . This heartfelt guide offers gentle support and practical wisdom to help you navigate anticipatory grief, make compassionate decisions, and prepare emotionally for the farewell with love and dignity .Through empathetic guidance, the book helps you understand the stages of grief before loss, cope with fear and uncertainty, and create meaningful moments with your pet during their final chapter . It addresses difficult conversations with veterinarians, quality-of-life considerations, and how to honor your pets comfort while honoring your own emotional limits .Readers will also learn how to build rituals of connection, say goodbye in ways that feel true, and process the complex emotions that arise when love and loss coexist . With calming reassurance and clear strategies, this guide supports you in finding peace, presence, and strength during an incredibly tender time.More than preparation, this book is about compassiontoward your pet and yourself . It reminds you that choosing love, comfort, and respect at the end is a powerful act of care, and that healing can begin even before the farewell .