1) How do glacial and interglacials affect the environment (e.g., Europe and Africa) and migration routes? Describe the environmental changes that occur during glacial and interglacial?
Glaciers carry material as they pass, but the ground underneath them is often sculpted and carved away. When it became colder and drier, the evolutionary wave that led to Homo habilis started due to climate changes. Temperatures fall, and lengthy ice sheets spread out from the poles and high mountains, leading to cold periods. There are interglacial warming cycles between the four or more main glaciations, with temperatures close to now. Human evolution was heavily influenced by the extreme environmental changes that led them to evolve new adaptive features.
2) How would the opening and restricting of migrations routes affect evolution? For example, aspects like gene flow, genetic drift, speciation, etc.
It is understood that migrant human populations had interbred with archaic humans’ genetic diversity so that contemporary human populations are primarily descended from regional varieties of archaic human beings. This interbreeding changes the genetic formation of offspring born out of it.
3) What physical characteristics define modern humans? Be specific
The lighter construction of their skeletons characterizes modern humans compared with earlier humans. They have o which differ in size demographically between males and females, but the average size is around 1300 cubic centimeters. They have a skinny, strongly carved skull with a less highly built, smooth and near vertical forehead, with smaller teeth. Modern human faces also display much less of the heavy ridge of the brow
4) What is H. heidelbergensis, what is its relationship to H. Erectus and modern humans? What is their relationship to Neanderthals?
Homo heidelbergensis is an indigenous species or subspecies of prehistoric human that lived during the Middle Pleistocene as the most common ancestor of modern humans and Neanderthals. They had a long jaw, large brow ridges, a long and low brain cap, and thick vault bones that suggested that they had a lower face projecting. The enlarged brain includes the modern features seen in the skull, such as the enhanced sides of the more-rounded back of the skull, widened and extended forehead. They had broad chests and a robust build like that of Neanderthals. To the exception of the African fossils, H. heidelbergensis is the ancestor of the Neanderthals. Recent results indicate that their DNA is more similar to that of Neanderthal.
5) What areas did H. heidelbergensis live? What time period did they live?
Ancient fossils show that Homo heidelbsergensis lived in Africa, dating about 600,000 to 200,000. In the early 90s, the fossil first originally appeared to match an ancient human jaw found near Mauer’s town, 16 km (10 miles) southeast of Heidelberg, Germany. Similar fossils were also found at Bodo (Ethiopia), Kabwe (Zambia), Ndutu (Tanzania), Petralona (Greece)
and Arago (France)
6) What areas did Neandertals inhabit? What area are they not found?
The Neanderthal lineage was already well known and spread widely in Eurasia, from Portugal and Wales in the west through to the Altai Mountains of Siberia in the east, judging from fossil evidence from Sima de Los Huesos in northern Spain and Swanscombe in Kent. The genomes of African origin people showed little or no signs of this genetic exchange, making sense since Neanderthals never populated Africa.
7) What kind of tool technology is being used during this time period? How is it different from the tool technologies used before?
Advanced implements were developed; early hominins used more basic Oldowan instruments, sharp-edged stone flakes. Tools being used today are reusable, portable tools designed to be taken from place to place instead of being made every time required. They have increased percussion brushing to relatively standardized forms.
8) How do Neandertals differ physically from modern humans, and why? What kind of
the environment are Neanderthals adapted to?
In general, Neanderthal bones are thicker, were more robust, and had larger brains, but also shortened limbs than modern humans. They also had eyebrow ridges that were more prominent, slimmer yet broader noses and more shrinking chins than anatomically modern humans. The Neanderthals’ larger physical construction was due to their adaptation to Europe’s Ice Age, which included winter climates brutally, so their larger construction helped conserve heat. Another theory is that their more massive structure allowed them to use physical hunting tactics because Neanderthals were less technologically advanced than modern humans.
9) Did Neandertals have any relationship to humans? What kind of relationship was it?
Studies indicate that as early as 37,000 years ago, the Neanderthals may have interbred with some of the ancestors of modern Eurasians. Researchers have found that Neanderthal DNA consists of 2.5 percent of an average person living outside Africa today. This implied that some crossbreeding took place between the two kinds of humans, possibly in the Middle East, where Homo erectus already living there would have been met by early modern humans moving out of Africa.
10) What kind of evidence confirms a relationship between humans and Neanderthals?
Neanderthal-derived DNA has been found in the genome sequences of most or possibly all modern populations, differing significantly by region. According to some evidence, it is also lower in Melanesians as opposed to both Asian People and Europeans. Though DNA testing was uncertain, canine tooth size and general bone reliability results show that humans might not be as different from Neanderthals as we sometimes say, with main exceptions.
11) Were Neandertals portrayed accurately in the past (as dumb and brutish)? Why did they get this reputation?
12) What is some evidence that Neandertals may have spoken like us?
Research strongly supports the argument that speech and language are an old aspect of our history that goes back to the last common origin we shared with the Neanderthals. Since the 1990s, there has been discovering a Neanderthal hyoid that looks exactly like a modern human. As it protects the root of the tongue, the hyoid bone is essential for speaking. It is not put in the correct position to verbalize like humans in non-human primates. Neanderthals had the physical characteristics to create sounds that could serve as the basis of speech, although any words they produced may have sounded a little foreign to modern human ears.
13) Another type of human-like species lived in the same period as Neandertals and ancient
Modern humans, who are they? Where were they found? How do we know that they are not the same type of human as Neanderthal or us? What evidence is found of their existence?
Denisovans fossils were found in Denisova cave hence the name. The DNA of Denisovans is similar to that of modern humans and Neanderthals and is considered a human relative. Scientists found the fossil genome of a child and compared it with modern humans and Neanderthals’ genomes. They found that the child was genetically similar to both Neanderthals and Homo sapiens but was sufficiently distinct to be recognized as a new human race.
14) What kind of relationship did these other humans like species have with modern humans and Neanderthals, and what is the evidence for this relationship?
Denisovans’ DNA is similar to that of modern humans and Neanderthals and is considered a human relative because of the interbred with the two. Its geographical origin is still uncertain, but Asia’s early fossils indicate that the continent is as likely as Europe or Africa to be a place of origin. Denisovans are both modern human and Neanderthal ancestors and presumably diverged from these lineages.
Neanderthal Intellect and Behavior
Neanderthals were very smart and skilled humans, considering their status as simple ‘cavemen,’ as demonstrated by excavated artifacts such as spears and flint hand axes. The Neanderthals have experienced tool makers (Pääbo, n.d.). Advanced stone technology was developed by Neanderthals, which involved creating pre-shaped stone objects that could later be completed into a final tool. It meant that Neanderthals were free to move away from raw material sources and yet capable of making instruments when needed. Bone damage found on Neanderthals themselves indicates that huge animals were killed at close range – a dangerous tactic that would take great ability, bravery, and resilience.
Neanderthal Art
Conceptual sketches, including long lines, dot symbols, and a human hand’s shape, were drawn by the Neanderthal on the cave walls. They also made ornaments from bird wings and feathers. The first works of art dating to the period of the Neanderthals are cave paintings and shell beads, including the oldest cave art ever discovered (Standish et al., 2020). The shells found were unique because they were perforated with holes and colored with red and yellow pigments. The mineral pigments themselves acted as containers. The dyes were used on the shells, cave paintings, and even as body paint. Dating of seashells used this on necklaces and are dyed with pigments confirms the early ages of cave art.