Chirand and wild rice was harvested during summer and again during winter. The wild forms of rice are "Oryza rifipogon" and "Oryza perennis", from which "Oryza sativa" (Asian rice) originated. The archaeological finds in Chirand are from a Neolithic deposit of thickness, a Chalcolithic layer thick and iron age formation of thickness. Copper was used during the Chalcolithic period, while iron was found in the upper strata. A cache of 88 Kushan period coins were unearthed at the site. Analysis of antiquities related to skeletal remains revealed 12 species of domesticated and wild animals: cattle, buffaloes ("Bubalisbubalis linn"), sheep ("Ovis aries"),
Helitron (biology) Helitron (biology) Helitrons are one of the three groups of eukaryotic class 2 transposable elements (TEs) so far described. They are the eukaryotic rolling-circle transposable elements which are hypothesized to transpose by a rolling circle replication mechanism via a single-stranded DNA intermediate. They were first discovered in plants ("Arabidopsis thaliana" and "Oryza sativa") and in the nematode "Caenorhabditis elegans", and now they have been identified in a diverse range of species, from protists to mammals. Helitrons make up a substantial fraction of many genomes where non-autonomous elements frequently outnumber the putative autonomous partner. Helitrons seem to have a major role