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Roman noblewoman’s tomb reveals secrets of ancient concrete resilience. Over time, concrete cracks and crumbles. Well, most concrete cracks and crumbles. Structures built in ancient Rome are still standing, exhibiting remarkable durability despite conditions that would devastate modern concrete. One of these structures is the large cylindrical tomb of first-century noblewoman Caecilia Metella. New research shows that the quality of the concrete of her tomb may exceed that of her male contemporaries' monuments because of the volcanic aggregate the builders chose and the unusual chemical interactions with rain and groundwater with that aggregate over two millennia. Source 3q.
Global Warming: Natural Or Man-made?: Global warming has been in and out as the "latest" hot topic for many years. It is, according to modern scientists, the result of man-made industrial pollutants, clearing forested areas, agriculture, etc. But now they are thinking it started way before the Industrial Revolution... By Xaphandrt 5th Aug, 2021 - 4:39pmDiscuss It!
Russia vs USA: versus Russia: 'The Evil Empire'? Are they all that bad or is it just the USA trying to portray Russia as bad because they are a world power with land bigger and a society very different from the USA ideal? By Yankee 15th Apr, 2021 - 2:19pmDiscuss It!