why is the sea salty?

Posted by 212158***, views: 12822,
    www.youtube.com , level=12, 1:19 , on 2019/07/18

family- friendly companies

Posted by 212158***, views: 10965,
    www.youtube.com , level=12, 2:14 , on 2019/07/18

possible causes of crimes

Posted by 212158***, views: 10435,
    www.youtube.com , level=13, 2:07 , on 2019/07/18

Can DNA Be Used to Store the World’s Computer Data?

Posted by sjhong***, views: 9256,
    www.listen-and-write.com , level=9, 1:01 , on 2019/07/18

the origins of ceramics

Posted by 212158***, views: 11742,
    www.youtube.com , level=11, 8:10 , on 2019/07/17

scientific research in the continent Antarctita

Posted by 212158***, views: 10589,
    www.youtube.com , level=13, 5:58 , on 2019/07/17

teachiques for removing carbon dioxide from the atmosphere

Posted by 212158***, views: 10153,
    www.youtube.com , level=13, 5:09 , on 2019/07/17

Ed Sheeran - Best Part Of Me (feat. YEBBA) [Official Lyric Video]

Posted by sjhong***, views: 11907,
    www.youtube.com , level=6, 1:31 , on 2019/07/15

How to Fight Climate Change? Plant a Trillion Trees

Posted by sjhong***, views: 15169,
    www.listen-and-write.com , level=7, 1:14 , on 2019/07/15

What do the lungs do?

Posted by 262225***, views: 12767,
    www.listen-and-write.com , level=16, 3:36 , on 2019/07/15