363K views · 5K reactions | On an underwater adventure with his dad, Perth 10-year-old Rehan Somaweera spotted something that led him to become one of Australia's youngest published scientists. His discovery of a nuclear-follower behaviour between the West Australian common octopus and the brown-spotted wrasse was published in a CSIRO journal earlier this year. MORE | https://ab.co/3m0ByQR | ABC Perth | Facebook

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Country music songwriter Jim McBride, whose songs were recorded by Johnny Cash, George Jones, Willie Nelson and more, has died at age 78. David Muir reports on his legacy. https://abcnews.go.com/ | ABC World News Tonight with David Muir