monaural deafness
Oxygen levels on Earth skyrocketed 2.4 billion years ago, when cyanobacteria evolved photosynthesis:[…]. The evolutionary precursor of photosynthesis is still under debate, and a new study sheds light. The critical component of the photosynthetic system is the “water-oxidizing complex”, made up of manganese atoms and a calcium atom.
Old World porcupines inhabit much of Africa, southern Europe, and Asia. Old World porcupines are also known to gnaw on bones (Bruno and Riccardi 1995; Nowak 1999; Smithers, Skinner, and Chimimba 2005; Barhelmess 2006; Arslan 2008).
“What about that polony he was with?” ¶ “She doesn't matter”, the Boy said, “She's just a buer—he gave her a half. I saw him hand it out.”
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