“Wonder is the heaviest element on the periodic table. Even a tiny fleck of it stops time.”

“I've always loved scuba diving and the cell-tickling feel of being underwater, though it poses unique frustrations. Alone, but with others, you may share the same sights and feelings, but you can't communicate well.”

“All relationships change the brain - but most important are the intimate bonds that foster or fail us, altering the delicate circuits that shape memories, emotions and that ultimate souvenir, the self.”

“Even without seeing the crickets, grasshoppers, cicadas and katydids, we hear them shrilling in this season and trust that they're the tiny living gargoyles entomologists claim.”

“We ogle plants and animals up close on television, the Internet and in the movies. We may not worship the animals we see, but we still regard them as necessary physical and spiritual companions. Technological nature can't completely satisfy that yearning.”

“Living with anyone for many years takes skill. To keep peace in the household, couples learn to adapt to one another, hopefully in positive ways.”

“I'm fascinated how often and with what whole-heartedness people will risk their lives to perform acts of courage, sacrifice, and compassion for total strangers.”

“Love is the best school, but the tuition is high and the homework can be painful.”

“Artificial intelligence is growing up fast, as are robots whose facial expressions can elicit empathy and make your mirror neurons quiver.”

“Hurricane season brings a humbling reminder that, despite our technologies, most of nature remains unpredictable.”

“Nothing is more memorable than a smell. One scent can be unexpected, momentary and fleeting, yet conjure up a childhood summer beside a lake in the mountains.”