Intermediate Word:  indigene  (a) a recessive gene  (b) a native  (c) principal player  (d) "helper" gene
Difficult Word: - ratite  (a) lacking a keel  (b) large flightless bird  (c) tightly woven  (d) loosely woven

Mars Underground: The Harsh Reality of Life Below - Space.com  While neither water nor brine actually imply life, fresh shafts of optimism now shine on the possibility that an ancient soup of organic materials might have allowed the genesis of microscopic organisms, which could still dwell in the belly of the red planet. Importantly, there are organisms on Earth that thrive in environments so salty they'd make a McDonald's French fry cringe. They're called halophiles (pronounced halo-files).
DNA Sunscreen could be made of DNA  - BBC  Scientists at Boston University School of Medicine found a DNA fragment called pTT can help repair and prevent skin damage caused by UV radiation. PTT triggers a protein, called p53, that suppresses the growth of tumours, and helps repair damaged DNA. Mice with pTT rubbed into their skin were six times less likely to develop a tumour. The DNA fragment works by penetrating the skin, then mimicking a response normally caused by DNA damage, which triggers DNA repair enzymes. "The results of this latest study are promising, but the research is at a very early stage "The results of this latest study are promising, but the research is at a very early stage.

Will The World Just Chill Out - SpaceDaily  Left:  This conceptual illustration of the ocean conveyor belt circulation illustrates the 1,000-year long cycle. Warm, shallow water is chilled in the far North Atlantic, grows saltier and sinks. The cold, salty current flows south near the bottom, creating a northward surface layer flow of the warm, less salty water. Full size image  Global warming could plunge North America and Western Europe into a deep freeze, possibly within only a few decades. That's the paradoxical scenario gaining credibility among many climate scientists. The thawing of sea ice covering the Arctic could disturb or even halt large currents in the Atlantic Ocean. Without the vast heat that these ocean currents deliver, Europe's average temperature would likely drop 5 to 10C (9 to 18F),

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