סנטה מריה2הספינה “סנטה מריה” (Santa María) היתה ספינת הדגל של כריסטופר קולומבוס במסעו הראשון לגילוי יבשת אמריקה באוגוסט 1492. יחד איתה היו עוד שתי ספינות- הניניה והפינטה. ספינה זו היתה מסוג “קרארק” (דגם ספינה בעלת שלושה או ארבעה תרנים אשר פיתחו ספנים פורטוגלים במאה ה-15) והיא טבעה כחודש לאחר גילוי אמריקה על-ידי קולומבוס.
לאחרונה מגלה ספינות טבועות בשם בארי קליפורד טוען שגילה את שרידי סנטה מריה בחוף הצפוני של האיטי (מדינה באיים הקאריביים) כבר לפני כ-10 שנים, כשאז סבר בטעות שמדובר בספינה מתקופה מאוחרת. זיהוי הספינה נעשה לפי אבני איזון אשר מקורם מספרד ותותח מתקופת המאה ה-15 אשר נקרא “האקדח המעשן”.
קליפורד מתכונן למשות את השרידי הספינה באישורה של רפובליקת האיטי ולבדוק את הממצאים בצורה יסודית יותר.
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טבעת החותם שהתגלתה בקבר- צילום קלרה עמית באדיבות רשות העתיקות
טבעת החותם שהתגלתה בקבר- צילום קלרה עמית באדיבות רשות העתיקות

במהלכם של חפירות הצלה של רשות העתיקות באיזור תל שדוד בצפון עמק יזרעאל, התגלה קבר של אדם, כנראה כנעני, אשר נקבר שם במאה ה-13 לפסה”נ, לפני כ-3,300 שנים. התגלית נחשפה לאחר שחברת נתיבי הגז הטבעי לישראל חפרה באיזור לשם הנחת צינור גז. בעקבות תגלית זו רשות העתיקות ביצעה שם חפירת הצלה ארכיאולוגית.
בקבר גילו החופרים ארון קבורה מחרס אשר מעוצב בצורת אדם. בתוך הארון היו כלי אגירה, כלי פולחן ועצמות בעלי חיים עם חפצים אישיים של אדם שהיה שייך לאליטה המקומית וכנראה שירת כפקיד כנעני בשירות הצבא המצרי.
כלים אלו שימשו בתרבות המצרית למנחה לאלים ולמזון למתים לאחר מותם. כמו כן התגלתה בקבר טבעת חותם מזהב, אשר שימשה לחתימה על מסמכים, כשעליה שם המלך סתי הראשון (מלך מצרי אשר שלט במצריים העתיקה במאה ה-13 לפנה”ס. הוא היה אביו של רעמסס השני, אשר חלק מחוקרי התנ”ך מזהים אותו עם פרעה מסיפור יציאת מצריים בספר שמות).
ברשות העתיקות מתכננים לבדוק אפשרות לקחת דגימת DNA מהקבר על מנת לבדוק האם אכן האדם ממקור כנעני או ממקור מצרי.

 
קישור לידיעה-אתר הידען

קישור לידיעה-רשות העתיקות

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הריסות קרתגו- התמונה מויקיפדיה- מותרת לשימוש נחלת הכללקרתגו היתה עיר-מדינה ממקור פניקי, אשר ישבה באיזור תוניסיה של היום בין שנת 800 לפני הספירה ועד 146 לפני הספירה, אז הוחרבה בידי הצבא הרומאי.
בכתבי היוונים והרומאים מוזכר מנהגם של אוייביהם, תושבי קרתגו, להקריב את ילדהם לאלים. בשל היות הקרתגים אוייבי היוונים והרומאים, סברו חוקרים רבים שמדובר בעלילת שווא, אלא שממצאים ארכיאולוגים אחרונים, אשר נאספו במסגרת מחקר בינלאומי, מוכיחים שתושבי קרתגו אכן הקריבו את ילדיהם. החוקרים אף טוענים שאותו הנוהג של הקרבת התינוקות הוא זה אשר גרם להקמת התרבות הקרתגית, כאשר זו התפלגה מפיניקים אחרים בשל מנהג קיצוני זה והקימה עיר בעצמה.
הילדים שהוקרבו, בנים ובנות, היו בני מספר שבועות בזמן הקרבתם. מאחר שתינוקות רבים נפטרו באותה התקופה, הקרבת תינוקות כפולחן דתי לא נראתה מזעזעת אז כפי שהיא נראית לנו כיום. למרות זאת, גם בתקופת העולם העתיק הדבר נראה כקיצוני והיה נדיר יחסית.

 
קישור לידיעה-אתר אוקספורד

קצת על העיר קרתגו

זכויות התמונה שמורות למוזיאון "יד ושם"
זכויות התמונה שמורות למוזיאון “יד ושם”

בזמן מלחמת העולם השנייה, אסר היטלר על ייצור של נשק ביולוגי. מאידך עדויות שהצטברו לאחרונה על המכון האנטומולוגי, אשר היה ממוקם במחנה הריכוז דכאו ליד העיר דכאו בגרמניה, מעידות על כך שהנאצים ניסו לבדוק אם היתושים המעבירים את טפיל המלריה יכולים לשמש כנשק ביולוגי.
את הסברה הזו העלה ד”ר קלאוס ריינהרט מאוניברסיטת טובינגן בגרמניה, כאשר טען שהמכון האנטומולוגי לא רק התעסק במחלת הטיפוס (שחיידקי ה-
Rickettsia הגורמים אותו עוברים לאדם על-ידי חרקים, למשל כינים) אלא גם בחן את יכולת ההישרדות של יתושים אשר נושאים בתוכם את טפיל המלריה
(יצור חד-תאי בשם פלסמודיום)- זאת במטרה להשתמש בהם כנשק ביולוגי.
מיקום הניסויים היה במחנה הריכוז דכאו מאחר ששם היו יכולים הנאצים לבצע ניסויים על אסירים.

 

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מוטציותנגיפי האיידס, הסארס, הפוליו וכדומה מפתחים כל הזמן מוטציות. מעטים מאותן המוטציות יכולות להיות מסוכנות לאנושות, כאשר המדע עד היום התקשה לזהות את המוטציות הללו ואז להפנות את המשאבים המחקרים בדיוק אל אותן המוטציות.
מחקר חדש של אוניברסיטת חיפה בשיתוף אוניברסיטת קליפורניה הצליח לפתח דרך חדשה לזהות את אותן מוטציות מסוכנות. חוקרי אוניברסיטת קליפורניה פיתחו טכנולוגיה חדשה אשר עוזרת ל”קריאה” נכונה של הגנום ואז ליכולת להבדיל בין הטעויות במכשירי המדידה הקיימים כיום לבין מוטציות אמיתיות ואילו ד”ר ליאוניד ברודסקי ממרכז טאובר לביואינפורמטיקה באוניברסיטת חיפה פיתח שיטה חישובית אשר מזהה את אותן מוטציות נדירות מסוכנות.
במחקר עקבו החוקרים אחרי נגיף הפוליו והצליחו לצמצם את כל שלל המוטציות ל-5 מוטציות עיקריות בעייתיות. מחקר זה יכול להוות דרך לטפל באותן מוטציות עוד לפני שגרמו נזק ופגעו ממש באנשים.

 

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גרזן אבן פרהיסטורי
גרזן אבן פרהיסטורי

במהלך חפירות של רשות העתיקות, אשר קדמו להרחבת כביש 38 באיזור העיר בית שמש, נחשפו שרידי יישוב שהקדום שבהם מתוארך לראשית האלף ה-8 לפנה”ס, התקופה הניאוליתית הקדם קראמית והמאוחר לסוף האלף ה-4 לפנה”ס, סוף התקופה הכלקוליתית. זו הפעם הראשונה שמתגלה מבנה כה קדום באיזור שפלת יהודה.
מדובר בעדות קדומה למבנה קבע ותקופה שבה התחילו לביית בעלי חיים וצמחים. ליד המבנה נמצאו תשעה גרזני אבן מאני צור וגיר אשר ננטשו מסיבה שאיננה ברורה.
באיזור החפירה נמצאו כלי פולחן אשר מרמזים על קיום מקדש פולחני במקום, סוג מבנה שיחסית נדיר למצוא מתקופה זו. גילויים אלו מחזקים את עדויות המדע לגבי הזמן שבו עברה החברה הכפרית לתפקד כחברה עירונית.

 

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קצת על התקופה הניאוליתית הקדם קראמית

קצת על התקופה הכלקוליתית

 

התמונה מתוך אתר tsofar- ישראל ארצי
ים כנרת- התמונה מתוך אתר tsofar (ישראל ארצי)

לפני יותר מ-3,000 שנה, בשלהי תקופת הברונזה, חלה בתקופת זמן קצרה ביותר קריסה של אימפריות גדולות כמו האימפריה החיתית, האימפריה המצרית, התרבות המיקנית ועוד. לאחר קריסה זו עלו ממלכות תקופת הברזל, ביניהם גם ישראל, יהודה והפלישתים.
הסיבה לקריסה זו איננה ברורה, אם כי ישנם כל מיני השערות. במחקר אחרון, אשר בוצע בשיתוף פעולה ישראלי-גרמני בראשותה של ד”ר דפנה לנגוט ופרופ’ ישראל פינקלשטיין מאוניברסיטת תל-אביב, הוצאה אבקת צמחים (פולן) מעומק של כ-40 מטר מתחת למי הכנרת.
אבקת צמחים זו עמידה מאוד לפגעי הטבע והזמן, ובדיקה שלה זיהתה תקופת יובש חמורה לאורך של כ-150 שנה בשלהי תקופת הברונזה- דבר שיכול להסביר את נפילת האימפריות.
הייחוד במחקר זה, לדברי החוקרת, הוא המרווח הצר יחסית בין הדגימות, כ-40 שנה, כשמחקרים קודמים בדקו מרווחים גדולים הרבה יותר. כמו כן במחקר זה הצליחו החוקרים ליצור קורלציה בין זמן הבצורת לאירועי שריפות באיזור המזרח התיכון ובעיקר בישראל- מה שמחזק את ממצאיהם.

מבוסס על ידיעתה של אורנה כהן, עיתון גלילאו מ”ס 184, ע”מ 32-33.

 

קישור לידיעה-אתר נשיונל גיאוגרפיק

קצת על תקופת הברונזה המאוחרת

להלן החלק השני של ספרי עיון מומלצים לטעמי לשנת 2013 (קישור לחלק א’). הספרים הם מתחומי עיון שונים וכל אחד מהם הם סוג של חווית קריאה שונה.

למה האבולוציה נכונה?- ג’רי א. קווין (הוצאת ספרי עליית הגג ומישכל)

למה האבולוציה נכונה

לפני שאסקור את הספר, אני חייב לציין שקראתי הרבה מאוד ספרים על אבולוציה, ביניהם את ספריו המצוינים של ריצ’רד דוקינס (הגן האנוכי, השען העיוור, הטיפוס על ההר הבלתי סביר, הצגה הגדולה בתבל ועוד) וספרים נוספים כמו “הדג שבתוכנו” ועוד.

מהסיבה הזו, לפני שהתחלתי לקרוא את הספר “למה האבולוציה נכונה?” לא חשבתי שהוא יחדש לי הרבה. כמובן שטעיתי.

מטרת הספר היא בעצם להפריך את טענות הבריאתנים, תומכי התיאוריה של התכנון התבוני. אותי לא ממש צריך לשכנע בעניין, אבל עדיין נהנתי מספר שוטף אשר משובצים בו סיפורים רבים מעולם הטבע והאבולוציה.

לדעתי, כוחו של הספר הוא ביכולת התיאורית המובנת לספק דרך קוהרנטית להבנת האבולוציה וזה מה שמביא אותו לספק חווית קריאה ייחודית.

ציון הספר- 8.4

אצבע גלילאו- פיטר אטקינס (הוצאת ספרים ע”ש י”ל מאגנס)

 

אצבע גלילאו

בניגוד לספר שמעליו, “אצבע גלילאו” של פיטר אטקינס הוא בהחלט לא ספר קל לקריאה. הקריאה בו לא שוטפת ומצריכה ריכוז. מאידך הוא מכיל פרטים רבים ומנסה לתת תמונת מצב עדכנית ומקיפה על תחומים מעולם המדע כמו אבולוציה, אטומים, סימטריה, קוסמולוגיה, מרחב זמן ועוד.

הייתי מגדיר את הספר הזה, בגלל מורכבות החומר שבו, על התפר בין ספר מדע פופולרי לבין ספר לימוד. לדעתי הוא סוג של ספר למתקדמים, לאנשים שכבר מכירים את התיאוריות הגדולות ורוצים לשקוע תוך חוויה עמוקה ומפורטת יותר. אני חושב שהיתרון הגדול של הספר הזה הוא הדרך שבה הוא מעורר לחשוב על  תחומי המדע ועל התגליות שבהם.

אטקינס מטפל באופן יסודי ובעיקר שיטתי בכל תחום מדע עיקרי שקיים כיום – מעניין מאוד, מקסים אבל בהחלט לא קל.

ציון הספר- 7.8

מדוע טייסי קמיקאזה חובשים קסדות?- יעקוב בורק (הוצאת עם עובד)

 

מדוע טייסי קמיקזה חובשים קסדות

ספר זה, אם אני לא טועה, הוא ספרו השלישי של יעקוב בורק, סופר ואיש עסקים ישראלי. כל פרק בספר מציג תוצאות מחקר בנושא מסוים במדעי החברה ובמיוחד בכלכלה.

יש בספר עיסוק במוסר, באלטרואיזם, בקנאה ושמחה לאיד, דחיינות, חרטה, הצלחה ועוד. אפשר בהחלט ללמוד מהספר, להחכים ולנסות ליישם. כמו כן יש חשיפה מעניינת לצורת עשייה של מחקר, להיגיון שעומד מאחורי שאלת המחקר ולהסקת המסקנות.

ספר בהחלט טוב, אך לדעתי פחות טוב מספרו הראשון “האם שימפנזים חושבים על פרישה?”, גם בגלל שספרים אשר עוסקים בכלכלה ומדעי החברה הגיעו לטעמי לסוג של ריוויון מסוים.

ציון הספר- 7.9

הקנון המדעי- נטלי אנג’יר (הוצאת אחוזת בית)

 

 הקנון-המדעי

הקנון המדעי, אותו כתבה נטלי אנג’יר, סופרת ועיתונאית מדע הוא ספר מצויין בזכות הבהירות שלו. אם נשווה אותו לספר “אצבע גלילאו”, השני בסקירה הזו, אז אפשר להגיד שהמטרה של שני הספרים היתה די זהה, להציג את התיאוריות העכשוויות בתחומי המדע, רק ש”הקנון המדעי” עושה זאת בצורה הרבה יותר פשוטה וברורה, בעוד “אצבע גלילאו” מעמיק ומסבך. אולי ההבדלים נובעים מכך שהראשון נכתב על-ידי עיתונאית והשני על ידי מדען.

הספר “הקנון המדעי” מציג בפרקיו הראשונים את סגנון החשיבה המדעית, תורת ההסתברות וקנה המידה. בהמשך הוא מתעסק בפיזיקה, כימיה, ביולוגיה אבולוציונית ומולקולרית ובסיומו בהצגת תיאוריות מדעיות מתחומי הגיאולוגיה והאסטרונומיה.

לסיכום, קחו לכם כמה ימים ותחוו ספר מדע פופולרי מצויין ומומלץ, אשר זכה גם בפרס פוליצר ולתפוצה בינלאומית נרחבת.

ציון הספר- 8.6

ג’ינגיס ח’אן- ג’ק ותרפורד (הוצאת דביר)

גיגניס חאן

הזמן שבו אנחנו חיים, לפחות בימינו אנו, מתוחם בתוך תקופה קצרה מאוד של ההיסטוריה. ישנם ספרים אשר יכולים לקחת אותך הרחק לעתיד ומאידך ישנם ספרים שיכולים לקחת אותך הרחק אל העבר- כזה הוא הספר “ג’ינגיס חאן” של ג’ק ותרפורד.

הספר לוקח אותנו קצת פחות מאלף שנה אחורה, אל יום הולדתו של ג’ינגיס חאן בשנת 1162 ומגולל את הקמתה של האימפריה המונגולית, האימפריה השנייה בגדולה בעולם והראשונה בעלת השטח הרציף.

הספר מתאר את המניעים של ג’ינגיס חאן בהקמת האימפריה, בין השאר רצונו

להחזיר את אשתו שנחטפה. הוא מתאר את האימפריה המונגולית, אימפריה אשר התבססה על צבא ממושמע ומאורגן מאוד בעל שיטת לחימה מהירה וטכנולוגית ועל מערכת חוקים הוגנת שגם ג’ינגיס חאן היה כפוף אליה.

הוא מתמודד עם המוטיבים הפחות חיוביים שבהם הואשמו המונגולים ומדגיש את הצלחתו של ג’ינגיס חאן לכונן שלטון אשר הצליח לאחד את כל סין ועמים כבושים אחרים, תוך דגילה בחופש דת מוחלט.

לסיכום, ספר מצויין זה ייתן לכם הצצה נרחבת אל תקופה ואימפריה מופלאה בהיסטוריה האנושית, אימפריה שצאצאיה האחרונים עוד שלטו בעיר “בוכרה” עד לשנת 1920.

ציון הספר- 9.1

כותב הפוסט- עופר בן חורין,  [email protected]

קישור אל ספרי עיון מומלצים לשנת 2013- חלק א’