понедельник, 23 сентября 2019 г.

Life’s a Blast Life begins with limitless potential. Sperm…


Life’s a Blast


Life begins with limitless potential. Sperm fertilises egg, and the product then divides to form two cells that have the capacity to ultimately develop into any type of cell. This ‘totipotent’ state is tantalising to researchers interested in regenerative medicine, as it could allow the regrowth of any material in the body, but encouraging cells into this super flexible state is hard. When developing cells reach the womb, they have formed a hollow ball structure – a blastocyst with cells destined to form the placenta on the outside, and totipotent cells inside. Now researchers have artificially created a blastocyst-like structure (left, compared to an actual blastocyst, right, stained to highlight DNA and other molecules). Though not yet a perfect replica, it prompted pregnancy-related changes when implanted in a mouse’s womb, raising hopes that it could prove useful for fertility research, and might be a step forward for regenerative medicine.


Written by Anthony Lewis



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Hey! I was wondering how everyone on the ISS adjusts to each other’s culture and...


2019 September 23 Equinox: The Sun from Solstice to Solstice…


2019 September 23


Equinox: The Sun from Solstice to Solstice
Image Credit & Copyright: Tunç Tezel (TWAN)


Explanation: Today is an equinox, a date when day and night are equal. Tomorrow, and every day until the next equinox, the night will be longer than the day in Earth’s northern hemisphere, and the day will be longer than the night in Earth’s southern hemisphere. An equinox occurs midway between the two solstices, when the days and nights are the least equal. The featured picture is a composite of hourly images taken of the Sun above Bursa, Turkey on key days from solstice to equinox to solstice. The bottom Sun band was taken during the north’s winter solstice in 2007 December, when the Sun could not rise very high in the sky nor stay above the horizon very long. This lack of Sun caused winter. The top Sun band was taken during the northern summer solstice in 2008 June, when the Sun rose highest in the sky and stayed above the horizon for more than 12 hours. This abundance of Sun caused summer. The middle band was taken during an equinox in 2008 March, but it is the same sun band that Earthlings see today, the day of the most recent equinox.


∞ Source: apod.nasa.gov/apod/ap190923.html


Is the earth really as beautiful as they say from space?


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Y Ffor (Four Crosses) Prehistoric Burial Chamber, North Wales, 21.9.19.


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Penarth Prehistoric Burial Chamber, North Wales, 21.9.19.









Penarth Prehistoric Burial Chamber, North Wales, 21.9.19.


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Moel Goedog Prehistoric Ring Cairn 1, Harlech, North Wales, 21.9.19.


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Rhoslan Prehistoric Burial Chamber, North Wales, 21.9.19.


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