Posted 28 May 201928 May 2019Tue 28 May 2019 at 10:00pm, updated 23 Oct 201923 Oct 2019Wed 23 Oct 2019 at 6:26am Why are there waves?(Nina Maile Gordon/The Conversation CC BY-NC-ND)Share A big wave lands at Dee Why Beach in Sydney.(Taro Taylor/Flickr, CC BY) This wave is breaking over the top of the surfer because the top half of the wave is travelling faster than the bottom half.(Flickr/Duncan Rawlinson - Duncan.co - @thelastminute, CC BY)LoadingPosted 28 May 201928 May 2019Tue 28 May 2019 at 10:00pm, updated 23 Oct 201923 Oct 2019Wed 23 Oct 2019 at 6:26amShare