Elon Musk, Amber Heard Step Out

As Elon Musk toils away on linking human brains to computers, he apparently has Amber Heard by his side to bounce ideas off of. The 45-year-old Tesla and SpaceX CEO was spotted with the 31-year-old actress, formerly married to Johnny Depp, taking a stroll in Australia's Currumbin Wildlife Sanctuary—their "first public outing," People reports. Their weekend of togetherness included plenty of PDA, from their "arm-in-arm" walk and hand clasping at the sanctuary to an Instagram photo Heard posted Sunday night showing her leaning on Musk, a giant lipstick mark on his cheek, above her caption: "Cheeky." Gizmodo, which notes Musk put up a similar picture, notes that while the pair's romancing may only be "Instagram-official," there's a more important question we should be pondering: Will they die on Mars together? (More Elon Musk stories.)