Why Are Dogs So Insanely Happy to See Us When We Get Home?

Unlike a certain companion animal that will go unnamed, dogs lose their minds when reunited with their owners. But it’s not immediately obvious why our canine companions should grant us such an over-the-top greeting—especially considering the power imbalance that exists between the two species. We spoke to the experts… »7/31/15 2:28pm7/31/15 2:28pm


[UPDATED] Why the U.S. Is One of the Cruelest Places in the World for Lab Animals

The United States prides itself on being a country of animal lovers. But when it comes to the ethical treatment of lab animals, few countries perform worse. Here's how the U.S. practices measure up to the rest of the world. [UPDATE: io9 has editorial concerns with this article.] »11/26/14 4:38pm11/26/14 4:38pm

The Disturbingly Inexact Science Of Food Expiration Dates

It's an all too common ritual: A product in the kitchen passes its "best before" date, so you toss it. Trouble is, it was probably perfectly safe to eat — and you just wasted good food. This is a problem that's only getting worse. Here's what you need to know about "expired" foods — and how to make sure you're eating… »9/02/14 3:48pm9/02/14 3:48pm

No, corsets did not destroy the health of Victorian women

In the annals of Victorian medical history, few foes receive as much bile as the corset, which physicians claimed contributed to miscarriages, cancer, and slow, crushing deaths. But while there are some health problems that can be linked to corsets, they aren't nearly the instruments of medical terror that they're… »3/17/14 3:38pm3/17/14 3:38pm

Why anti-vaxxers might be creating a world of more dangerous viruses

In science fiction, we see all kinds of nightmare viruses that evolve immunity to vaccinations. The scary part? It could actually happen in real life, especially if anti-vaxxers encourage people not to get vaccinated. Populations with pockets of non-vaccinators are more likely to evolve vaccine-resistant viruses… »1/01/14 3:30pm1/01/14 3:30pm