we talked to rachel feltman, dr. michelle thaller and daniela hernandez. >> people know they're large balls of ice and rock but they don't realize how valuable they are. they are time capsules, bits of planets that were never made into anything larger. when our solar system were formed, they were bits left over. when you examine them, you see where our whole chemistry came from and our history of where we are. >> rose: we continue with a conversation of mark phillips of cbs news london. >> i think we're at a crisis in journalism now, not just tv journalism, and i think it's been illustrated -- being illustrated now in the course of the presidential election campaign here, was illustrated in the course of the brexit referendum campaign, we're applying rules that served us well of fairness and balance and letting the two sides make their arguments and presenting it in the same way we have historically covering politics in the western world. >> rose: and we conclude with reid hoffman, part two of a conversation about th

we talked to rachel feltman, dr.dez. >> people know they're large balls of ice and rock but they don't realize how valuable they are. they are time capsules, bits of planets that were never made into anything larger. when our solar system were formed, they were bits left over. when you examine them, you see where our whole chemistry came from and our history of where we