Wait, is that... human bones on Mars? Not quite, conspiracy theorists: in fact it's just a rock that happens to look a little bit like a femur thigh bone. It was snapped by the Mars rover Curiosity using its MastCam. [NASA]
This astronaut Alexander Gerst as he guides in the Automated Transfer Vehicle 5 to dock with the ISS. In his hand? A simple plastic ruler. Someone aboard the ISS must manually check the approach speed of the cargo vessel to ensure its safe docking. That check involves holding a clear plastic ruler to a display to check the speed.
What is this, Breaking Bad in space? Not quite. This is actually European Space Agency astronaut Alexander Gerst venturing into the Automated Transfer Vehicle Georges Lemaitre for the first time since it recently docked with the ISS. The face mask is to avoid the inhalation of any dust or debris created during its journey. [ESA]