A parasitic caterpillar fungus that grows in the Himalayas has many names, according to Scientific American — yarsagumba, yarchagumba, yartsa gunba, yatsa gunbu. But we are only going to remember one name: Himalayan Viagra. This …
A reader frets about his caffeine-delivery equipment. Umbra gives him a dose of reality.
A reader wonders how to find a hose that's not made of PVC plastics. Umbra's not going to water down this answer.
A reader asks if it’s ethical to mine asteroids. Umbra takes us on a voyage of discovery.
How can you prevent turning red while staying green? Umbra takes on this burning issue.
Grist’s green-living pioneer, the Greenie Pig, quit shopping, cold turkey, for a month. Well, almost. What do you think -- in the No New Stuff challenge, did she pass or fail?
A reader thinks a motorized bicycle would make riding easier, but it feels like cheating. Umbra makes the call.
It’s great when celebrities get the green bug and decide they want to use their fame to tell people “hey, this climate change thing? It’s a problem.” But guys, GUYS, as much as we appreciate …
A reader wonders what to do with all the CD cases he no longer needs. Umbra has the answers.