Mot nghien cuu  moi tiet lo mot nhom bo sat bay songtrong ky nguyen cua khung long khoang 230 den 65 trieu nam truoc khongbat moi khi dang bay, ma quap chung tren mat dat.

Cho den nay, cac nha co sinh vat hoc van ve chan dung cua nhung con "than lan co canh" pterosaurs nhu la nhung ke kiem an khi dang bay la la mat dat, giong nhu cach ma mong bien van bat ca ngay nay.

Nhung phat hien moi cong bo khong nhat tri nhu vay.

"Theo gia thuyet  cua chung toi, bay ve co ban la mot cach dichuyen. Chung su dung viec bay de di tu diem A den B. Con phan lon cuocsong cua chung, khi kiem an va sinh san, deu duoc thuc hien tren matdat, chu khong phai tren khong", Mark  Witton, dong tac gia  tu Dai hoc  Portsmouth o Anh noi.

Nhom cua Witton rut ra dieu nay tu viec phan tich  hoa thach cua motnhom pterosaurs khong rang co ten goi azhdarchid - nhom co kich cotrung binh lon hon nhieu nhung con pterosaurs khac. Chang han, mottrong nhung loai lon nhat cua nhom, Quetzalcoatlu, nang toi 250 kg voisai canh hon 10 met va chieu cao tuong duong voi huou cao co.

50% hoa thach cua chung tim thay tren dat lien. Cac dac diem khac cuaxuong, nhu chan dai va co khong linh dong, cung khong phu hop voi motke kiem an theo cach bay la la.

"Tat ca cac chi tiet ve hinh thai co the va moi truong  ma chungsong cho thay chung kiem song bang cach di bo tren mat dat, tim kiem  vavo lay con moi", cac tac gia  noi. 

Ban co y kien gi ve bai viet Bo sat bay khong lo chen ca khung long nay? Hay goi suy nghi, binh luan, danh gia, loi khuyen ... cua ban ve bai viet Bo sat bay khong lo chen ca khung long ban tai day.