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		| Paper: | 
		The Role of the Solar XUV Flux and Impacts in the Earliest Atmosphere of the Earth | 
	 
	
		| Volume: | 
		430, Pathways Towards Habitable Planets | 
	 
	
		| Page: | 
		547 | 
	 
	
		| Authors: | 
		Trigo-Rodríguez, J. M.; Ribas, I.; Llorca, J. | 
	 
	
	
		| Abstract: | 
		During the formation stages of the terrestrial planets, the Sun’s high  energy emissions were about 100 times stronger than today. At that early times,  the Earth also underwent a violent bombardment phase by planetesimals. We have  explored different compositional scenarios to know the properties of the  atmosphere in that period. We discuss the implications that these processes  could have in the atmospheric evolution and ultimate appearance  of life on Earth. | 
	 
	
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