//The twin issues of First Cause, and Abiogenesis, demand answers, not forthcoming from atheists//
The need to show cause in the Universe went out when Quantum Mechanics came in. QM showed us that that existence itself is random at the fundamental level of Space-Time with particles constantly appearing and disappearing at random.
Moreover, it is theism that has an insurmountable problem with First Cause, providing no explanation for the origin of the most complex thing in the Universe, their God.
The leading hypothesis for explaining abiogenesis is found in alkaline hydrothermal vents where a chemical reaction identical to the most fundamental energy reaction in all of life is found in the Serpentinization of Olivine.
Below is a link to just one article on this process, which was only discovered in 2000. It is only a matter of time before this process, or one very like it, becomes accepted as the source of life on this planet.
http://schaechter.asmblog.org/schaechter/2014/03/from-geology-to-biology-a-serpentine-story-of-early-life.html