Ti sao loi chim di c lun bay ng ng?

Th T, 01/01/2020 19:57:10 +07:00

Mi nm, bt chp khong cch hng nghn km, cc loi chim di c lun bay ng hng v n cng mt a im; iu g gip chng xc nh phng hng chnh xc nh vy?