The 21st-century civilization has faced dramatic challenges related to the ecology and welfare of every single person.

What separates a good idea from a bad one? It isn’t always easy to tell. Take the invention of vaccination, for example. Drawing pus from a woman infected with cowpox and injecting it into an ...

Researchers are going back to Thomas Edison's old nickel-iron battery design more than 100 years later to make a new, ...