- 1781
- 1977-05-05
science: الطاقة الشمسية
- 1773
- 1977-04-27
- 1752
- 1977-04-06
- 1751
- 1977-04-05
- 1731
- 1977-03-16
- 1680
- 1977-01-22
- 1667
- 1977-01-09
- 1635
- 1976-12-06
- 1620
- 1976-11-19
- 1612
- 1976-11-11
- 1603
- 1976-11-02
- 1589
- 1976-10-19
- 1582
- 1976-10-12
- 1548
- 1976-09-07
- 1547
- 1976-09-06
- 1520
- 1976-08-10
- 1464
- 1976-06-15
- 1424
- 1976-05-06
- 1409
- 1976-04-21
- 1403
- 1976-04-15