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Mass extinctions of land-dwelling animals occur in 27-million-year cycle Mass extinctions of land-dwelling animals—including amphibians, reptiles, mammals, and birds—follow a cycle of about 27 million years, coi… Started by Dr. Krishna Kumari Challa	1	Dec 12, 2020 Reply by Dr. Krishna Kumari Challa
Qs people asked me on science and my replies to them - part 219 Q: Why did Mount Everest's height change? Krishna: The world's highest mountain is now officially a little higher. China and Nepal present… Started by Dr. Krishna Kumari Challa	1	Dec 10, 2020 Reply by Dr. Krishna Kumari Challa
Science of building sandcastles finally understood Water vapor from ambient air will spontaneously condense inside porous materials or between touching surfaces. But with the liquid layer be… Started by Dr. Krishna Kumari Challa	1	Dec 10, 2020 Reply by Dr. Krishna Kumari Challa
A simple rule drives the evolution of useless complexity A new study has shown that elaborate protein structures accumulate over deep time even when they serve no purpose, because a universal bioc… Started by Dr. Krishna Kumari Challa	1	Dec 10, 2020 Reply by Dr. Krishna Kumari Challa
Qs people asked me on science and my replies to them - part 218 Q: Can just wearing masks, using hand sanitizers and maintaining physical distance protect us from Covid 19? I am getting invitations for… Started by Dr. Krishna Kumari Challa	1	Dec 8, 2020 Reply by Dr. Krishna Kumari Challa
Researchers observe what could be the first hints of dark bosons Extremely light and weakly interacting particles may play a crucial role in cosmology and in the ongoing search for dark matter. Unfortuna… Started by Dr. Krishna Kumari Challa	1	Dec 5, 2020 Reply by Dr. Krishna Kumari Challa
Scientists predict how our solar system is going to disintegrate in the end There can be no end to our informed imagination. When we think about our solar system, this imagination becomes very complicated. But stil… Started by Dr. Krishna Kumari Challa	1	Nov 30, 2020 Reply by Dr. Krishna Kumari Challa
How Covid 19 virus survives on different surfaces COVID-19 virus survives on surfaces within thin film How does the COVID-19 virus manage to survive on surfaces? To find out, researchers in… Started by Dr. Krishna Kumari Challa	1	Nov 25, 2020 Reply by Dr. Krishna Kumari Challa
Regeneration Biology Several people ask me interesting Qs on regeneration. They read about lost or amputated limbs. They wonder whether science can help these… Started by Dr. Krishna Kumari Challa	1	Nov 23, 2020 Reply by Dr. Krishna Kumari Challa
Right facts about menstruation For women and girls: Here I am discussing a taboo subject. But I am doing this for your own benefit. So just relax and sit tight! Menstruat… Started by Dr. Krishna Kumari Challa	2	Nov 23, 2020 Reply by Dr. Krishna Kumari Challa