Except Garuda puraanam no other puranam says like this .In all other three yugas they can remarry and live happily; Only in kali yuga we can live only for hundred years; in other yugas you can live for 1000; 10000; 100000; years;It is the chance for the two legged animals to attain paramaatma by doing yoga praanayama and meditation from this jeevathma and also do it with sincerity with purity of mind; Pancha kacham differentiates from married man and un married man; madisar saree differentiates from married woman and un married woman; white saree differntiate from sumangali and amangali; on those days now a days all are wearing salwar cummies midis and we cannot differentiate them. Dharma sastrams says desam kaalam anusarithu oorudan koodi waall enru solkirathu.