Science is a journal published by the AAAS [American Association for the Advancement of Science], founded in 1848, which describes itself as "an international non-profit organization dedicated to advancing science around the world by serving as an educator, leader, spokesperson and professional association". The stated mission of the AAAS is to "advance science, engineering and innovation throughout the world for the benefit of all people".
This journal has assembled a splendid collection of papers concerning the creature Ardipithecus ramidus, and this collection can be downloaded in PDF form. All you need to do is to register (free) at their website, which can be accessed by clicking the above banners. I've downloaded all their 15 files, and I find them relatively easy to read and totally fascinating.