Experiments to detect the epoch of cosmic reionization:

Cosmic reionization is a significant event in the history of the universe, marking the transition from dark ages to the formation of the first luminous structures. This process occurred roughly between 150 million to one billion years after the Big Bang, leading to the formation of the ionized intergalactic medium we observe today.

From arXiv:1109.6012

Our team is working on designing novel methods to observe the redshifted 21 cm line of atomic hydrogen from the dark ages to the epoch of reionization.