This weekend in New York, San Francisco, Toronto and other cities, thousands will march in gay pride parades. But these joyful rainbow-hued events are not without controversy, writes Laurie Marhoefer of the University of Washington. Many participants will meet the usual counter demonstrations – but conflict also comes from within the queer community. And the argument about the right way to celebrate and protest dates back before the Stonewall Inn riots that inspired the modern pride movement to the gender-bending nightclubs of post World War I Berlin.

Where do major scientific advances come from? Many of us think about the individual brilliance of Einstein, but he’s an exception and not the norm. Much more often, scientists, thinkers and researchers build on each other’s work. Edward Wasserman at the University of Iowa and Eric Scerri at UCLA lay out a new way of thinking about innovation – as a process less like inspiration and more like evolution.

The Senate revealed its health care bill Thursday, which many had hoped would be a kinder offering than the one passed by the House in May. Many provisions are very similar to the House bill, but the Senate version does allow for a longer phase-out of Medicaid expansion. We assembled four essential reads from previous expert analyses to help you sort out the bill, which likely will be voted upon next week.