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		| Paper: | 
		Dark Energy | 
	 
	
		| Volume: | 
		379, Cosmic Frontiers | 
	 
	
		| Page: | 
		83 | 
	 
	
		| Authors: | 
		Peebles, P.J.E. | 
	 
	
	
		| Abstract: | 
		I offer some lessons from the history of ideas about dark energy and the history of the development of the now compelling web of evidence that the ΛCDM cosmology is a good approximation to what actually happened. | 
	 
	
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