they start tomorrow in geneva without iran. a last-minute invitation to iran by the u.s. was withdrawn. the move to disinvite iran is being criticized by russia's foreign minister. scientists are baffled by the sudden appearance of a mysterious donut shaped rock on mars. get this, it wasn't there 12 days ago. researchers say it's not like anything they've ever seen before. they think, they believe maybe perhaps it was blown out of the ground by meet roid impact and landed there. >> or else? >> somebody landed there and put it in. >> maybe it really is a donut. >> donuts on mars. >> trips to mars increase substantially. >> we're going now. >> right. >> is there wind on mars?