An astrobiologist looks for clues about Martian life at Utah's Great Salt Lake; how different experts work together to build skyscrapers; large-scale industrial 3D printing; a fun experiment one can try at home.

An ecologist's virtual reality technology helps study and save coral reefs; a cosmetic chemist creates moisturizer in her lab; an environmental scientist uses cutting-edge technology to fight smog; Dr. Brain explains the feeling of deja vu.