I’ve edited a lot of stories about animals and evolution since I started working for The Conversation four years ago but the science behind how humans evolved still astounds me. Take this recent study about the long, bizarre journey our eyes took before reaching their modern form. Research from Lund University and the University of Sussex suggests our eyes come from a kind of three-eyed worm that lost its “steering” eyes when it changed lifestyle. For millions of years it burrowed under the seabed and lived as a filter feeder. Read on to find out what happened to its vision next.

Meanwhile, as the world braces for the impact of war in the Middle East, read our explainer of how price controls work and whether they could be a decent way to protect struggling households.

And unless you’ve been living under a rock, you’ve probably read plenty about the Iran war and oil price escalation. But you may not have heard that the world’s supply of helium has been disrupted. That has major implications for medical care.