Questions with the keyword 'gravity'

• why is it that when humans jump into the air they are pulled back down to the ground by gravity but when birds fly they by BronaghR17 to Chris, Sarah Comments: (No comments so far )
• why is there gravity in space by mikey and tadgh to Chris, Joanne, Kathryn, Kieran, Sarah Comments: (No comments so far )
• is gravity weakening? by Mr.MagicMonkeyMan to Chris, Joanne, Kathryn, Kieran, Sarah Comments: (No comments so far )