Some say that your cellphone can give you cancer, even though the jury is still out, but this device from researchers at Harvard is a smartphone compatible gadget that helps detect cancer in its early stages. Extracting large tissue samples is painful, so researchers at Harvard Medical are now testing a prototype handheld device attached to a smartphone that takes very small tissue samples and tests them for signs of cancer within half an hour.

That is amazingly fast. It is in the prototype stage right now, so don’t expect your doctor to have one just yet. But when they do, we can catch the disease faster and treat it more effectively.

Most people drink coffee for the caffeine, whether to help them wake up or stay alert, but some people drink it because they like the taste and don’t want to get the crazy jitters associated with the drink. For these people, who don’t want to be fooled into drinking the go juice, there are the D+caf strips.

These strips allow you to tell whether or not some dork at a coffee shop gave you caffeine, when you actually ordered decaf. Just dip the strip in and it will change colors if it detects more than 20mg of caffeine. And because you detected it, you are still calm enough not to throw it at the dude.