Advertisement
If you have a new account but are having problems posting or verifying your account, please email us on hello@boards.ie for help. Thanks :)
Hello all! Please ensure that you are posting a new thread or question in the appropriate forum. The Feedback forum is overwhelmed with questions that are having to be moved elsewhere. If you need help to verify your account contact hello@boards.ie
Hi all! We have been experiencing an issue on site where threads have been missing the latest postings. The platform host Vanilla are working on this issue. A workaround that has been used by some is to navigate back from 1 to 10+ pages to re-sync the thread and this will then show the latest posts. Thanks, Mike.
Hi there,
There is an issue with role permissions that is being worked on at the moment.
If you are having trouble with access or permissions on regional forums please post here to get access: https://www.boards.ie/discussion/2058365403/you-do-not-have-permission-for-that#latest

The Prehistoric Shark Thread

2»

Comments

  • #52
    Adam Khor
    Registered Users, Registered Users 2 Posts: 5,279 ✭✭✭Adam Khor


    Proportions of O. megalodon calculated in new study that compares it with other sharks besides the great white:

    https://www.bbc.com/news/uk-wales-54011932
    Results suggest a 16m (52ft) megalodon - almost three times as long as a great white shark - is likely to have had a head about 4.65m (15ft) long, a dorsal fin as large as an entire adult human and a tail about 3.85m (13ft) high.

    _114229766_sharkedit.png


  • #53
    Adam Khor
    Registered Users, Registered Users 2 Posts: 5,279 ✭✭✭Adam Khor


    More evidence that sharks may have evolved from bony fish:

    http://www.sci-news.com/paleontology/minjinia-turgenensis-08823.html

    image_8823-Minjinia-turgenensis.jpg


  • #54
    Adam Khor
    Registered Users, Registered Users 2 Posts: 5,279 ✭✭✭Adam Khor


    Scientists discover 24 million year old megashark "nursery". This was Carcharocles/Otodus angustidens, an ancestor of the famous megalodon. At 9 m long, it was as large as the largest killer whales of our days, but still smaller than its famous descendant.

    https://www.vice.com/en/article/pkde4k/scientists-discover-24-million-year-old-megashark-hunting-ground-in-south-carolina

    tiburonaustralia2_db9d7a70_2000x1399.jpg
    In addition to providing evidence that the assemblages preserve a (relatively) safe haven for baby megasharks, the team also found that the C. angustidens population at this site is the largest known in the fossil record, at 8.85 meters in length.

    These details are important because there are major gaps in our knowledge of C. angustidens, including how it grew, what it ate, or the size of its global range.


Advertisement