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Author: Martin Karl-Friedrich Bader (MENAFN - The Conversation) Plants use their leaves to make food from the sun s energy and carbon dioxide. With very few exceptions of parasitic plants , no tree is known to grow without green foliage â or to be more precise, no tree can start life without leaves or some sort of green tissue containing chlorophyll. But some may end up as zombie trees long after they lose all leaves and large parts of their trunk, either to disease or the chainsaw. Such undead tree stumps have been observed for almost 200 years, but the evolutionary and physiological processes leading to their existence remain a mystery. One reason is because they are rare. Another is because whatever happens on their journey from feeding themselves to being fed happens out of sight â likely below ground. ....
The Best Way to Find Aliens on Other Worlds May Be to Search For Signs of Their Smog 14 FEBRUARY 2021 The Universe is a big place, so scientists are keen to narrow down their search for alien life – maybe by looking for radio signals, or hospitable climates, or huge megastructures. Now another sign of alien life is under consideration: atmospheric pollution.
If there are alien civilisations out there, the hypothesis goes, then their activities and industries may have produced pollution just like ours have. That pollution could be something we could spot in our scans of deep space. A new study suggests nitrogen dioxide gas (NO2) could indicate life on other planets: It can be produced from burning fossil fuels, as well as from lighting, volcanoes, and other biological, non-industrial sources. ....
29 JANUARY 2021 Ever since the discovery of a chemical called phosphine on Venus was announced in September last year, the scientific community has been in a tizzy. Scientists have published papers back and forth, trying to debunk or bolster the claim.
With two new papers landing this week, some are claiming the nails are being hammered into the phosphine coffin. We suspect, however, that the detection will continue to be scrutinised and discussed for some time to come. So what s the actual deal? Read on for a brief primer. Phosphine on Venus? Why does it matter? The discovery itself is pretty fascinating. Using two different instruments at different times - the James Clerk Maxwell Telescope (JCMT) in 2017 and the Atacama Large Millimeter/submillimeter Array (ALMA) in 2019 - a team led by astrobiologist Jane Greaves of Cardiff University in the UK detected the spectral signature of a chemical called phosphine in the Venusian atmosphere, at 20 parts per ....
Man Cracks Open an Agate, Discovers The Cookie Monster Inside STEPHANIE PAPPAS, LIVE SCIENCE 27 JANUARY 2021 You never know what you re going to get when you crack open a geode-like rock called an agate, but a new specimen is even more surprising than usual: It looks just like Cookie Monster.
The agate, found in Soledade, a precious stone hotspot in southern Brazil, is a dead ringer for the blue, googly-eyed Sesame Street Muppet. After its owner, California mineral collector Mike Bowers, posted about the agate on Facebook, it went viral, with write-ups in newspapers from Australia to Israel to the United States. ....