Science On Top

SpaceX plans to send uncrewed Dragon capsules to Mars... as early as 2018. And they might even be able to do it! Study of a rare fossil of a baby titanosaur shows that some dinosaurs were left to fend for themselves immediately after hatching. The bittersweet nightshade plant has an ancient defense mechanism - it recruits armies of ants to ward off slugs and predators. Astronomers have discovered that Makemake, the second brightest dwarf planet in the Kuiper belt, has a moon. Surprisingly, it's much darker than Makemake - and about 1,300 times fainter.   This episode contains traces of ABC News' in-depth coverage of the SpaceX announcement.