Evolution of the first single-celled organisms.  Advanced as tiny mitochondrial organisms invade large protist cells.

Formation of the single-celled zygote from the integration of tiny sperm into large ova.

Single-celled organisms evolve into cellular clusters eventually becoming the first soft-bodied invertebrates similar to a worm.

Cellular clusters form into a simple-structured invertebrate embryo similar to a worm.

First chordates become primitive fish.  Next, cartilage gives the basic form.  Eventually, cartilage is replaced by a complex bony endoskeleton.

Gills transform into lungs.  Structure changes from amphibian to reptile to eventually mammal.

Spinal cord forms.  Next, cartilage gives the basic form.  Eventually, cartilage is replaced by a complex bony endoskeleton.

Gills transform into lungs.  Structure changes from amphibian to reptile to eventually mammal.

Dinosaurs wiped out.

Birth of hominid ancestor primates.

Birth of a human.

Primates start learning to walk upright and grasp tools with their hands.

Self-preservation instinct has been upgraded to include basic emotion and learning skills.

Baby starts learning to walk upright and grasp toys with his hands.

Self-preservation instinct has been upgraded to include basic emotion and learning skills.

Caveman now has a higher intellect and the evolution of the center of the brain associated with creativity.

Crude but semi-recognizable drawings on cave walls, often done in red ocher.

Toddler now has a higher intellect and an increase of activity in the center of the brain associated with creativity.

Crude but semi-recognizable drawings on walls, often done in red crayon.

First written language.

Brain is as highly evolved as it's going to get.  Now it's just a matter of learning.

Learning to read and write.

Brain is as developed as it's going to get.  Now it's just a matter of learning.

Higher math and primitive science.  Learning to understand the world, but don't go close to the edge of the world.  That's where the monsters are.

Make sacrifices, and the gods will provide a good harvest.

Arithmetic and basic science.  Learning to understand the world, but don't look under the bed.  That's where the monsters are.

Make sacrifices, and Santa Claus will provide good presents.

Small tribes and imperial nations fight for dominance.

Social cliques form and vie for dominance.

Primitive superstitions are out.  Scientific fact is in.

New ideas are rejected summarily, because scientists already know everything.

Previous civilizations were ignorant.

Childish things are out.  Real life is in.

New ideas are rejected summarily, because groups of friends already know everything.

Older generations are ignorant.

Faced with the hardship of war, society becomes more serious.

Moving out into space leads to the realization that the universe is huge, and humanity doesn't know squat.

Faced with the hardship of paying bills, a person becomes more serious.

Moving out of parents' house leads to the realization that the world is huge, and a human doesn't know squat.

Ancient civilizations are smarter than previously thought.

Serious concern about the deteriorating O-zone layer and expanding population.  Efforts being made to cut down on fossil fuel emissions.

Parents are smarter than previously thought.

Serious concern about a deteriorating hairline and expanding waistline.  Effort being made to quit smoking.

Draw your own conclusions.

Improvements in financial stability.  Moving up in the world.  Making a definite mark.

Health concerns increase gradually.

Retirement.  Possible loss of mental faculties.

Eventually, the sun will burn out.  Will we have moved out to another world by then?  Who knows?

Eventually, the body will give out.  Will we live on in the next world?  Who knows?