1. Chapter at a Glance
History is the study of the human past. The past helps us understand who we are and how today's world came to be. But how do we measure time across thousands of years, and how do we know what happened long before writing existed? This chapter explains how historians count years (BCE and CE), use timelines, centuries and millenniums, and gather clues from many sources of history. It ends with a short look at how early humans lived and how farming began.
- Specialists who study the past — geologists, palaeontologists, anthropologists, archaeologists.
- Calendars, BCE/CE, no “year zero”, decades, centuries and millenniums.
- Timelines and how to calculate the gap between dates.
- Types of historical sources — archaeological, literary, artistic, oral, foreign accounts.
- Early humans as hunter-gatherers; the Ice Age; the beginning of farming and villages.
2. Who Studies the Past?
The Earth is about 4.54 billion years old, but modern humans (Homo sapiens) have existed for only about 3,00,000 (three lakh) years — a tiny part of Earth's story. Many experts help us learn about the past:
| Expert | Studies |
|---|---|
| Geologist | Rocks, soil, mountains, rivers and other physical features of the Earth |
| Palaeontologist | Fossils — preserved remains or impressions of very old plants, animals and humans |
| Anthropologist | Human societies and cultures, from the earliest times to today |
| Archaeologist | Remains dug up from the ground — tools, pots, beads, toys, bones, burnt grain, bricks |
| Epigraphist | Ancient inscriptions |
| Historian | All these clues, put together to write the story of the past |
3. Measuring Time in History
Every culture has its own calendar, often starting a new era from an important event. Today the Gregorian calendar is used worldwide (12 months, 365 days, with a leap year every four years), while Hindu, Muslim, Jewish, Chinese and other calendars are used to fix festivals. Many Indian calendars follow the Sun and Moon; a pañchānga lists days, festivals, eclipses and sunrise–sunset times.
- Years counted forward from the traditional year of Jesus Christ's birth are marked CE (Common Era) — earlier written AD. India's independence: 1947 CE.
- Years before that are counted backwards and marked BCE (Before Common Era) — earlier written BC. The Buddha was born around 560 BCE.
- There is no year zero: 1 CE comes right after 1 BCE.
Add the two numbers and subtract 1 (because there is no year zero). From 2 BCE to 2 CE: 2 + 2 − 1 = 3 years. Years since the Buddha's birth (taking 2026 CE): 560 + 2026 − 1 = 2,585 years. For two BCE dates, subtract the smaller from the larger (e.g. 560 BCE to 260 BCE = 300 years); for two CE dates, simply subtract.
Decade, century, millennium
| Unit | Length | Example |
|---|---|---|
| Decade | 10 years | 1990s |
| Century | 100 years | 21st century CE = 2001–2100; 3rd century BCE = 300–201 BCE |
| Millennium (plural: millenniums or millennia) | 1,000 years | 3rd millennium CE = 2001–3000; 1st millennium BCE = 1000–1 BCE |
A timeline is a line on which dates and events are marked in order. It shows at a glance which event came first. On a timeline, BCE dates lie to the left (past) and CE dates to the right; the numbers of BCE years get smaller as we move towards the present.
4. Sources of History
A source of history is any place, person, text or object that gives information about the past. Like pieces of a jigsaw puzzle, sources must be put together — and some pieces may be missing. Historians compare many sources; when they disagree, they judge which one is more reliable — like detectives.
| Type | Examples |
|---|---|
| Archaeological | Mounds, excavated houses and burials, tools, pottery, toys, ornaments, coins, monuments, bones and seeds |
| Inscriptions | Writing on stone pillars, rocks, copper plates and temple walls |
| Literary | Manuscripts, the Vedas and Itihāsas, poems, plays, stories, scientific texts, chronicles, genealogies |
| Foreign accounts | Travelogues of visitors to India |
| Artistic | Paintings, sculptures, carved panels |
| Oral | Folklore, songs and stories passed down by word of mouth |
| Modern / scientific | Studies of ancient climate, chemistry of finds, genetics of ancient people; newspapers and electronic media for recent history |
5. Early Humans and the First Crops
Early humans lived in small bands and moved from place to place in search of food. They were hunters and gatherers — they hunted animals and collected fruits, roots and seeds. They lived in temporary camps, caves and rock shelters, used fire, and made stone axes, blades and arrowheads. They also made beads and pendants and painted rock art showing animals and people; such paintings are found in hundreds of caves around the world (for example, at Bhimbetka in Madhya Pradesh).
The Earth has passed through very cold periods called Ice Ages. The last Ice Age lasted from over one lakh years ago until about 12,000 years ago. As the climate warmed, people in many regions began to settle down, grow cereals and tame animals such as cattle and goats. Settlements near rivers had water and fertile soil. More food meant bigger communities, led by chieftains, with land often farmed together. Hamlets grew into villages and some into small towns, linked by exchange of food, cloth and tools. New skills — pottery and metal-working (first copper, later iron) — made life easier and prepared the way for civilisation.
Pictures of early life often show men hunting and women cooking, but we have limited evidence; roles were probably shared in many ways.
6. Master Table: Key Terms
| Term | Meaning |
|---|---|
| History | Study of the human past |
| Era | A distinct period of time |
| BCE / CE | Before Common Era / Common Era (formerly BC / AD) |
| BCE to CE gap | BCE year + CE year − 1 |
| Fossil | Preserved remains or impressions of ancient life in rock or soil |
| Source of history | Anything that gives information about the past |
| Hunter-gatherer | Person living by hunting and collecting wild food |
| Hamlet | A very small settlement |
7. Master Summary Table
| Stage | Approx. time | Way of life |
|---|---|---|
| Homo sapiens appear | ~3,00,000 years ago | Hunting-gathering in bands |
| Earliest rock art | ~40,000 BCE | Painting in caves and shelters |
| End of last Ice Age | ~12,000 years ago (~10,000 BCE) | Warmer climate |
| First settlements and farming | ~8000 BCE onward | Crops, tamed animals, villages |
| Pottery and copper | Following millenniums | Villages, towns, trade |
Chart — how long ago (in years, approximate):
8. Mind Map
- Geologist, palaeontologist
- Anthropologist, archaeologist
- BCE / CE, no year 0
- Decade, century, millennium
- Archaeological, literary
- Artistic, oral, foreign
- Hunter-gatherers
- Rock art, fire, tools
- After Ice Age
- Villages, pottery, copper
9. Tips and Tricks
- BCE is like counting down to a rocket launch: 3, 2, 1 … then CE counts up.
- Century number = first two digits + 1 for CE years: 1947 → 19 + 1 = 20th century.
- “Palaeontologist” studies pale old fossils; “archaeologist” digs up arches and objects.
- Forgetting to subtract 1 when crossing from BCE to CE.
- Thinking 300 BCE is later than 200 BCE — it is earlier.
- Saying 2000 CE is in the 21st century — it is the last year of the 20th.
10. Important One-liners
- History is the study of the human past.
- Modern humans have existed for about three lakh years.
- Palaeontologists study fossils.
- Archaeologists study remains dug from the ground.
- CE means Common Era; BCE means Before Common Era.
- There is no year zero in the Gregorian calendar.
- The 21st century runs from 2001 to 2100.
- A pañchānga is a traditional Indian calendar book.
- The last Ice Age ended about 12,000 years ago.
- Copper was the first metal widely used, before iron.
11. Exam-pattern Questions with Detailed Answers
Who studies fossils?
- Geologist
- Palaeontologist
- Epigraphist
- Anthropologist
Show answer
Palaeontologists study fossils of ancient plants, animals and humans.
Answer: (B)
What do BCE and CE stand for?
Show answer
BCE = Before Common Era (earlier BC); CE = Common Era (earlier AD).
Answer: Before Common Era; Common Era
In which century is the year 1947 CE?
Show answer
The 20th century covers 1901–2000, so 1947 is in the 20th century CE.
Answer: 20th century CE
How many years passed between 100 BCE and 100 CE?
Show answer
Add and subtract 1 (no year zero): 100 + 100 − 1 = 199 years.
Answer: 199 years
Arrange in chronological order (earliest first): 323 CE, 323 BCE, 100 CE, 100 BCE, 1900 BCE, 1090 CE.
Show answer
BCE dates come first, larger number earlier: 1900 BCE, 323 BCE, 100 BCE; then CE dates in increasing order: 100 CE, 323 CE, 1090 CE.
Answer: 1900 BCE → 323 BCE → 100 BCE → 100 CE → 323 CE → 1090 CE
Classify these sources: copper plate, folk song, travelogue, coin, Vedas.
Show answer
Copper plate — inscription/archaeological; folk song — oral; travelogue — foreign account; coin — archaeological; Vedas — literary.
Answer: As above
Why did early farming settlements often grow near rivers?
Show answer
Rivers gave water for people, animals and crops, and the land beside them had fertile soil, making cultivation easier.
Answer: Water and fertile soil
Can historians be compared to detectives? Explain.
Show answer
Yes. Like detectives, historians collect clues (sources), check whether they agree, judge which are reliable when they conflict, and fill gaps carefully to reconstruct what happened. Some clues may always be missing.
Answer: Yes — both gather and test evidence to reconstruct events
If King Chandragupta was born in 320 CE, in which century was he born? If an event happened in 320 BCE, in which century was it?
Show answer
320 CE lies in 301–400 CE = 4th century CE. 320 BCE lies in 400–301 BCE = 4th century BCE.
Answer: 4th century CE; 4th century BCE
How did the end of the last Ice Age change human life?
Show answer
The warmer climate after about 12,000 years ago allowed people to settle, grow cereals and tame animals. Food became more reliable, communities grew, villages formed near rivers, and crafts like pottery and copper-working developed — leading towards towns and civilisation.
Answer: It led to settled farming, villages and new technologies
Why do historians use many sources instead of just one? Give an example.
Show answer
A single source may be incomplete or biased. Comparing sources confirms facts and reveals mistakes. For example, a king's inscription may praise him, but coins, archaeological finds and foreign accounts can show how large or wealthy his kingdom really was.
Answer: To cross-check and fill gaps
12. Quick Revision Summary
- Experts: geologists, palaeontologists, anthropologists, archaeologists, epigraphists, historians.
- BCE/CE; no year zero; BCE + CE − 1 for gaps; decade, century, millennium; timelines.
- Sources: archaeological, inscriptions, literary, foreign, artistic, oral, scientific.
- Early humans: hunter-gatherers, fire, stone tools, rock art.
- After the Ice Age (~12,000 years ago): farming, villages, pottery, copper → civilisation.