"There's a sort of sibling moratorium when you're establishing yourself as an adult. So much of your energy has to be focused on other things like work and kids. But when people become more settled, siblings tend to regroup because now you're building a new extended family."

"Toxins love to get you while you're young. Lead, mercury, secondhand smoke and sundry other environmental nasties do a lot more damage when tissue is immature, vulnerable and growing than when it's mature and comparatively fixed."

"Humans have a fraught relationship with beasts. They are our companions and our chattel, our family members and our laborers, our household pets and our household pests. We love them and cage them, admire them and abuse them. And, of course, we cook and eat them."

"When it comes to raising civilized kids there are no hard rules, but there are two things on which most parents agree: Boys are generally wilder than girls, and adolescents are wilder than kids of any other age. If you've got an adolescent boy, you're in the sweet spot for trouble."

"If you're the village blacksmith and a model T comes along, you better become a mechanic. People's lives are better when they get news online versus having to wait for the morning paper. It's a lot more efficient, a lot more real time, a lot less waste."

"As children, as we learn what things are, we are slowly learning to dismiss them visually. As adults, entirely submerged in words and concepts, we spend almost all of our time thinking and worrying about the past and the future, hardly ever looking at or engaging with the world visually."

"Use your lives wisely, my friends, and conserve these precious freedoms for future generations."

"It is a mark of many famous people that they cannot part with their brightest hour."