1. FROM THE BEGINING OF TIME
EVOLUTION OF HUMANS

2. BEGINNING OF HUMAN EXISTENCE

3. TRACES THE BEHINNING OF HUMAN EXISTENCE
IT WAS 5.6 MILLION YEARS AGO THAT HUMAN LIKE STRUCTURES APPERED ON EARTH.
AFTER THIS SEVERAL FORMS OF SPECIES EMERGED AND THEN BECAME EXTINCT.
HUMAN BEINGS RESEMBLING US ORIGINATED ABOUT 160,000 YEARS AGO.
DURING THIS PERIOD HUMANS OBTAINED FOOD BY SCAVENGING, HUNTING OR GATHERING.

4. SOURCES
HUMAN FOSSILS
STONE TOOLS
CAVE PAINTINGS

5. CHARLES DARWIN
24 NOVEMBER 1859 IN HIS BOOK THE ORIGIN OF SPECIES CHARLES DARWIN ARGUED THAT HUMANS HAVE ORIGINATED FROM ANIMALS A LONG TIME AGO.

6. PRIMATES
36 MILLION YEARS AGO A CATEGORY OF MAMMALS EMERGED IN ASIA AND AFRICA.
THEY INCLUDE MONKEYS,APES AND HUMANS,
THEY HAVE BODY HAIR,LONG GESTATION PERIODFOLLOWING BIRTH ,MAMMARY GLANDS.DIFFRENT TYPE OF TEETH AND THE ABILITY TO MAINTAIN CONSTANT BODY TEMPERATURE.

7. EVOLUTION

8. PRIMATES
HOMINOID
HOMINID
AUSTRALOPITHECUS
HOMO

9. DIFFERENCE BETWEEN HOMINOIDS AND HOMINIDS
HOMINOIDS HAVE SMALLER BRAIN
QUADRUPEDS,WALKING ON FOUR BUT WITH FLEXIBLE FORELIMBS.
DEXETERITY OF HAND WAS NOT THERE
HOMINIDS HAVE LARGER BRAIN
BIPEDAL LOCOMOTION
.UPRIGHT POSTURE AND BETTER DEXTERITY OF HANDS.

10. HOMO HABILIS ,TOOL MAKER
HOMO ERECTUS
HOMO SAPIEN WISE THINKING MAN

11. STAGES OF DEVELOPMENT

12. AFRICAN ORIGIN OF HOMINIDS

13. AFRICAN A
PES ARE MOST CLOSELY RELATED TO HOMINIDS

14. AUSTRALOPITHECUS THE TERM COMES FROM LATIN TERM austral AND pithecos
Austral MEANING SOUTHERN AND pithekos meaning ape.
THIS FORM OF HUMANS STILL RETAINED SOME FEATURES OF APE LIKE SMALL BRAIN SIZE,LARGE BACK TEETH AND LIMITED DEXTERITY OF HANDS.

15. AUSTRALOPITHECUS
UPRIGHT WALKING WAS ALSO RESTRICTED AS THEY STILL SPENT A LOT OF TIME ON TREES.
THEY RETAINED CHARACTERISTICS SUCH AS LONG FORELIMBS,CURVED HAND ANDFOOT BONES AND MOBILE ANKLE JOINTS.
OVER TIME TOOL MAKING AND LONG DISTANCE WALKING INCREASED ,MANY HUMAN CHARACTERESTICS DEVELOPED.

16. CLIMATE CHANGE
ONSET OF A PHASE OF GLACIATION OR AN ICE AGE WHEN LARGE PARTS OF EARTH WERE COVERED WITH SNOW.
REDUCTION IN TEMPERATURE AND RAINFALL GRASSLAND AREAS EXPANDED AT THE EXPENSE OF FORESTS WHICH LED TO THE GRADUAL EXTINCTION OF AUSTRALOPITHECUS AND REPLACEMENT BY HOMO, ADAPTED TO DRIER CONDITIONS.

17. HOMO HOMO HABILIS (TOOL MAKER ) HOMO ERECTUS (STANDING MAN )
HOMO SAPIENS (WISE AND THINKING MAN

18. POSITIVE FEEDBACK MECHANISM