“Babies don’t need to have seen or heard ... Perhaps a better question than “Why do we laugh?” is “What are the benefits of it?” Science is clear that laughter is good for us.

“Do we need to replace all the energy that we use now just with clean energy, or can we find ways to be more efficient with our energy use overall?” Odell said. Correction: The name of MIT’s ...

Once they do ... he said. "We still need to solve many more generic problems and then this can branch off into many applications." Edd Gent is a British freelance science writer now living ...

Related: Why do some people sneeze so loudly ... tickling in multiple species is unclear. We’ve tickled our way to some insights, but we’ll need more laughing rats, chimps, and people ...

The quantity of sleep you need is dictated ... mid-spin cycle—why would anyone do that?” This story is part of Popular Science’s Ask Us Anything series, where we answer your most outlandish ...

But why do trends themselves elicit such a pull? Blame evolution again, Rutledge suggests. “Our brains are hardwired to notice things that are weird,” she says. “If it’s not normal ...

You can't just stay in the science realm here. This is philosophical, what you're talking about here. When they asked me to prepare this book, I said, “I just need ... about, why do we have ...

Once they do, however, there is hope that the technology will crack a host of currently unsolvable challenges in chemistry, ...