Hidden beneath the waters surrounding Japan’s Yonaguni island are the towering ruins of a 10,000-year-old city built by a lost civilisation ... “One example I have described as an underwater sphinx ...

From A to H, light-gray pumice, black pumice, brown pumice, gray-banded pumice, black-and-white-banded pumice, white pumice, pink pumice, and obsidian-bearing pumice. I, J, and K show goose barnacles, ...

The militaries of Japan, Australia, the UK, and US have been testing unmanned maritime systems and associated technologies including communication technologies under the ongoing Exercise ‘Talisman ...