After his studies, Lal developed interest in archaeology and in 1943, became a trainee in excavation under a veteran British archaeologist, Mortimer Wheeler, starting with Taxila, and later at sites such as Harappa. Lal went on to work as an archaeologist for more than fifty years. In 1968, he was appointed the Director General of the Archaeological Survey of India where he would remain until 1972. Thereafter, Lal served as Director of the Indian Institute of Advanced Studies, Shimla.
Archaeological work
Between 1950-52, Lal worked on the archaeology of sites accounted for in the Hindu epic Mahabharata, including Hastinapura, the capital city ofthe Kurus. He made discoveries of many Painted Grey Ware sites in the Indo‑Gangetic Divide and upper Yamuna‑Ganga doab. In Nubia, the Archaeological Survey of India, Lal and his team discovered Middle and Late Stone Age tools in the terraces of the riverNile near Afyeh. The team excavated a few sites at Afyeh and cemetery of C-group people, where 109 graves would be located. Lal worked on Mesolithic site of Birbhanpur, Chalcolithic site of Gilund and Harappan site of Kalibangan. In 1975-76, Lal worked on the "Archaeology of Ramayana Sites" project funded by the ASI, which excavated five sites mentioned in the Hindu epic Ramayana - Ayodhya, Bharadwaj ashram, Nandigram, Chitrakoot and Shringaverapur. In the seven-page preliminary report submitted to the Archaeological Survey of India, Lal disclosed the discovery by his team of "pillar bases", immediately south of the Babri mosque structure in Ayodhya. Prof. B. B. Lal has published over 20 books and over 150 research papers and articles in national and international scientific journals. In his 2002 book, The Saraswati Flows On, Lal criticised the earlier Aryan invasion/migration theory, arguing that the Rig Vedic description of the Sarasvati River as "overflowing" contradicts the claim made by certain previous historians that the Indo-Aryan migration occurred 300 years after they contend the Sarasvati River dried up and which they also contended had led to the end of the Indus Valley Civilization. In his book ‘The Rigvedic People: ‘Invaders’? ‘Immigrants’? or Indigenous?’ Lal argues that the Rigvedic People and the authors of the Harappan civilisation were the same, they were the two faces of the same coin..
Ayodhya dispute
In Lal's 2008 book, Rāma, His Historicity, Mandir and Setu: Evidence of Literature, Archaeology and Other Sciences, he writes :
"Attached to the piers of the Babri Masjid, there were twelve stone pillars, which carried not only typical Hindu motifs and mouldings, but also figures of Hindu deities. It was self-evident that these pillars were not an integral part of the Masjid, but were foreign to it."
Legacy
The B. B. Lal Chair at Indian Institute of Technology, Kanpur has been established in his honour. The British archaeologists Stuart Piggott and D.H. Gordon describe Copper Hoards of the Gangetic Basin and the Hastinapura Excavation Report, two of Lal's works published in the Journal of the Archaeological Survey of India, as models of research and excavation reporting.
Honors
Awarded the title of Vidyā Vāridhi by the Nava Nālandā Mahāvihāra, Nālandā University in 1979.
Awarded the title of Mahāhopādhyāya by Mithila Vishwavidyalaya in 1982
Awarded the Padma Bhushan by the President of India in 2000
D. Litt. by the Deccan college, Deemed-to-be-University, 2014
Personal life
Lal lives in Delhi. He has three sons. The eldest, Rajesh Lal, is a retired Air Vice Marshal, Indian Air Force, His second son Vrajesh Lal and the third, Rakesh Lal, are businessmen based in Los Angeles, USA.
Works
Braj Basi Lal.. Paleoliths from Beas and Banganga Valleys. Ancient India. No.12. pp58-92.
Braj Basi Lal.. Birbhanpur: Microlith site in Damodar Valley., West Bengal. Ancient India. No..14. pp 4-40.
Braj Basi Lal.. From the Megalith to the Harappan: Tracing Back the Graffiti on Pottery, Ancient India. No. 16. Pp 4-24
Braj Basi Lal. Indian Archaeological Expedition to Qasr Ibrim 1961-62.
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Braj Basi Lal.. The Direction of Writing in the Harappan Script. Antiquity. Vol..XL. No.175. pp 52-56.
Braj Basi Lal.. A Deluge? Which Deluge? Yet Another Facet of Copper Hoard Culture. American Anthropologist. Vol. 70. Pp 857-73.
Special survey reports on selected towns: Dumka, 1981.
Braj Basi Lal.. The Giant Tank of Śṛiṅgaverapura. Illustrated London News. January. P59
Frontiers of the Indus Civilization, 1984.
Braj Basi Lal.. Should One Give up All Ethics for Promoting One's Theory? East and West. Vol. 53.. Nos. 1-4. Pp285-88.
Braj Basi Lal. Historicity of the Mahabharata: Evidence of Art, Literature and Archaeology. Aryan Books International. , 978-81-7305-459-4
Braj Basi Lal. Excavations at Kalibangan : The Harappans. Archaeological Survey of India.
Braj Basi Lal. Kauśāmbī Revisited Aryan Books International
Braj Basi Lal. Testing Ancient Traditions on the Touchstone of Archaeology. Aryan Books International
Braj Basi Lal. Agony of an Archaeologist. Aryan Books International.
BR Mani; Rajesh Lal; Neera Misra; Vinay Kumar Felicitating a Legendary Archaeology Prof B.B. Lal. Vols. III. BR Publishing Corporation.
Braj Basi Lal.. From the Mesolithic to the Mahājanapadas: The Rise of Civilisation in the Ganga Valley. Aryan Books International. ISBN