Dark Ages Radio Explorer
The beginning of structural complexity in the universe caused a remarkable transformation, but one that we have not yet looked into. By going even farther back than what the Hubble telescope can see, the truly first structures in the universe can be studied. Theoretical models suggest that present measurements are beginning to find the last part of Reionization, but the first stars and galaxies, in the Dark Ages and the Cosmic Dawn, currently lie above our understanding.