Small carved stone seals, pottery, and clay tablets from the ancient Indus Valley Civilization have long puzzled researchers. Spanning modern-day Pakistan and India, these artifacts date from around 2600–1900 BCE during a period of widespread urban development. Alexander Cunningham first introduced these unfamiliar seals to the public, and Daya Ram Sahni's 1921 excavations at Harappa—alongside work at Mohenjo-daro—established that the symbols belonged to an extensive ancient culture rather than isolated occurrences.
The Discovery
The artifacts typically feature animal figures carved alongside rows of symbols. When pressed into clay, the images and marks appear reversed. Many of these items are quite small, such as a square seal in the British Museum that measures roughly 2.5 centimeters across and bears six symbols above an animal. In contrast, an unusually long ten-symbol sequence made of gypsum was discovered at the Dholavira site in India, which scholars suggest may have been mounted on a wooden board above a gate.
What Scientists Found
Deciphering the Indus script presents significant challenges because most preserved inscriptions are extremely brief. Asko Parpola noted in a 1975 study that known inscriptions averaged only around five symbols. Key research efforts include:
- Systematic Cataloging: Iravatham Mahadevan compiled a concordance to examine symbol arrangements and order across different sites.
- Dravidian Hypothesis: Asko Parpola explored potential correspondences between the symbols and Dravidian languages in a 1994 publication.
- Non-Linguistic Theory: Steve Farmer and his colleagues argued the symbols might represent non-linguistic social or religious signs.
- Statistical Analysis: Rajesh Rao and others analyzed symbol sequences, suggesting their statistical properties resemble written language systems.
Why It Matters
Despite modern digital imaging and sequence analysis, researchers have yet to establish a widely accepted translation. An editorial in the 2025 journal Antiquity highlighted three primary obstacles: the brevity of the symbol sequences, the complete lack of reliable bilingual texts, and the unknown nature of the spoken language itself.
Source: ancient civilization archaeology discovery - BingNews · Published September 30, 2026