Science (Video)

Lucy's discovery in eastern Africa reshaped human origins research, highlighting our ancestors' diverse habitats. Initially thought vegetarians like chimpanzees, Lucy's group were adaptable omnivores. Recent findings suggest they used tools and hunted, challenging notions of early human development. This raises questions about when humanity's defining traits emerged. Did Lucy's dietary flexibility pave the way for our intelligence and tool use? Ongoing research aims to unravel these mysteries, using innovative methods to understand ancient diets and behaviors. Series: "CARTA - Center for Academic Research and Training in Anthropogeny" [Humanities] [Science] [Show ID: 39822]

The discovery of Lucy in 1974 gave insight into early hominin body form but lacked hand bones. Subsequent findings revealed Australopithecus afarensis hand morphology. New discoveries and research since then, including associated hand skeletons and archaeological evidence, have enhanced our understanding of hominin hand evolution and tool use. These advancements inform us about Lucy's tool-related abilities and dexterity, reshaping our interpretation of early human behavior. Series: "CARTA - Center for Academic Research and Training in Anthropogeny" [Humanities] [Science] [Show ID: 39821]

Lucy is one of the most famous fossils of all time. The discovery of this species had a major impact on the science of human origins and evolution. Why? What was that impact? The symposium speakers—each a prominent scientist in their field—will address this question and specifically discuss the discovery’s impact through time, starting with the first few years after the discovery, the lasting impact, and the state of the art in that research area today. We're celebrating the 50th anniversary of the discovery of the fossil skeleton “Lucy” with the aim of reigniting a global interest in how we “became human” and promoting the importance of connecting our human past to the global future on the planet. Series: "CARTA - Center for Academic Research and Training in Anthropogeny" [Humanities] [Science] [Show ID: 39829]

Benjamin Freedman, Ph.D., delves into the creation and functionality of kidney organoids. He discusses their focus on filtration over hormone functions, and answers intriguing questions about urine characterization and the necessity of organoid structures. Freedman explores the use of scaffolds for implants and ponders the philosophical implications of off-target cells in organoids, questioning whether these cells are a natural part of organ development. Series: "Stem Cell Channel" [Health and Medicine] [Science] [Show ID: 39455]

Paleoanthropology is booming with discoveries, reshaping our understanding of human evolution. Lucy's 1974 find stands as a milestone, providing crucial insights into early hominins. Her species, Australopithecus afarensis, remains a key reference, revealing bipedalism and dietary adaptations. Recent findings suggest bipedality evolved from arboreal upright apes, not chimpanzee-like ancestors. Earlier australopiths show bipedality predates dietary changes, indicating walking aided dietary shifts. Some australopiths may have used stone tools before significant brain enlargement in Homo. Lucy's discovery led to an explosion of insights, showing she was part of a diverse group of bipedal apes in the mid-Pliocene. Lucy remains central to understanding human evolution, highlighting the importance of her discovery in shaping our knowledge. Series: "CARTA - Center for Academic Research and Training in Anthropogeny" [Humanities] [Science] [Show ID: 39820]

Please join us for the annual Keeling lecture in honor of Scripps Professor Charles David Keeling’s life and invaluable contributions to climate science and the Scripps Institution of Oceanography. Tereza Cavazos's will present an overview of relevant climate drivers shared in the US-Mexico western border region, as well as their possible changes and impacts. From extreme weather to droughts, from the monsoon rains to the jet stream and El Niño events, these variations see no artificial borders; however, adaptation to climate change poses major challenges particularly south of the border. Delays in finding feasible and equitable actions can have severe consequences for present and future generations. Series: "Jeffrey B. Graham Perspectives on Ocean Science Lecture Series" [Science] [Show ID: 39650]

The savanna hypothesis suggests that early human ancestors evolved in open grasslands. Raymond Dart's 1925 discovery of Australopithecus africanus at Taung supported this idea. Lucy's 1974 discovery confirmed bipedalism in Australopithecus species but raised questions about their tree-dwelling habits. Studies since then have refined our understanding of ancient habitats and climates, showing that human evolution involved interactions with various environments, not just savannas. This requires a nuanced view of biomes, climates, and habitats to understand how early humans adapted and evolved. Series: "CARTA - Center for Academic Research and Training in Anthropogeny" [Humanities] [Science] [Show ID: 39819]

In 1974, understanding early human evolution was limited. Lucy's discovery provided insights into one early hominin, while her species, Australopithecus afarensis, revealed broader patterns. The abundance and quality of A. afarensis fossils help understand diversity, relationships, and the pace of evolution among hominins. Lucy's ilk sheds light on crucial topics such as taxic diversity, phylogenetic relationships, and the tempo of evolution within the hominin clade. They are key to unlocking the secrets of hominin evolutionary history before and after A. afarensis, offering valuable context for fossils found in southern and eastern Africa. Series: "CARTA - Center for Academic Research and Training in Anthropogeny" [Humanities] [Science] [Show ID: 39818]

Owing to its morphological and temporal placement, the Lucy species, Australopithecus afarensis, plays a pivotal role in our understanding of the human evolutionary career. Though many more fossil remains were recovered subsequent to Lucy’s discovery, the impact of the latter cannot be overstated not least its role as a trove of scientific data as well as its iconic nature. Research on Lucy and its species and continued fieldwork have inspired many research projects across Africa especially the Afar region of Ethiopia. One such project is the Dikika Research Project, which has discovered the earliest and most complete skeleton of a juvenile A. afarensis, dating back to 3.32 million years ago, filling in a major gap in our knowledge of the species. Here, I will briefly discuss what we learn from this skeleton about the Lucy species and what that implies to our knowledge of the many descendants of A. afarensis including our own species. Series: "CARTA - Center for Academic Research and Training in Anthropogeny" [Humanities] [Science] [Show ID: 39817]

The discovery of Lucy, a fossil from the 1970s, changed paleoanthropology. Before Lucy, scientists saw human ancestors as rough guides, not distinct species. This mindset dominated the interpretation of fossils. Lucy's discovery, representing a new species called Australopithecus afarensis, showed the need to define species clearly. The clash of old and new views was seen in a 1981 debate between Richard Leakey and Donald Johanson. Leakey's refusal to offer an alternative emphasized flaws in traditional practices. This marked a shift towards a better understanding of human origins and diversity, despite some scientists holding onto old ways. Series: "CARTA - Center for Academic Research and Training in Anthropogeny" [Humanities] [Science] [Show ID: 39816]