Science, Spoken

This storyoriginally appeared on Gristand is part of theClimate Deskcollaboration. Sometimes the most vicious fights occur over the smallest differences. Brutal battles have pitted Catholics that kneel in prayer against Protestant sects that stood before the same God. Learn about your ad choices: dovetail.prx.org/ad-choices

The best questions are always the ones that don't have a single clear answer. In my physics classes, I like to present students with problems that can promote a lively discussion—and to do that, they have to have multiple answers that could possibly make sense. (And they shouldn't involve lots of math, otherwise my students will just get hung up on the calculations.) Here is a version of one of these great questions; it's truly a classic. A human (person A below) has two baseballs. Learn about your ad choices: dovetail.prx.org/ad-choices

Anyone who travels to rocket launches regularly knows three things: Bring snacks, wear sunscreen, and don't book your flight home for the night after the scheduled takeoff. Chances are, you'll either miss the launch or your plane. A company called Rocket Lab provides no exception. The commercial space organization hopes to send up rockets just the right size for smaller satellites. But of three total launch attempts, it has delayed or scrubbed all of them. Learn about your ad choices: dovetail.prx.org/ad-choices

NASA has to start protecting planets better. The international treaty governing space—there is one—and the laws and regulations that follow it date back to the Cold War. That was before scientists knew about the oceans on moons around other planets, before they knew about how tough microorganisms get here on Earth (and so maybe in space too?), before they started planning experiments to look for life on Mars, and before tech billionaires started threatening to send people to space. Learn about your ad choices: dovetail.prx.org/ad-choices

Falcon Heavy is about to take off in a big way. Just a few months after its thrilling debut, SpaceX’s heavy-lift rocket is back in the headlines. Not for sending another cherry-red Tesla into space, but for gaining some major accolades from the Air Force. In a surprising move, and after just one flight, the Air Force announced it has certified Falcon Heavy for military launches and awarded the vehicle its first highly coveted launch contract: the AFSPC-52 mission. Learn about your ad choices: dovetail.prx.org/ad-choices

When Rick Ostfeld gets bitten by a tick, he knows right away. After decades studying tick-borne diseases as an ecologist at the Cary Institute of Ecosystem Studies in Millbrook, New York, Ostfeld has been bitten more than 100 times, and his body now reacts to tick saliva with an intense burning sensation. He’s an exception. Learn about your ad choices: dovetail.prx.org/ad-choices

Can you launch fireworks from your drone? OK, before I answer this question I have my own question: Why? Guys, why would you want to put fireworks on your drone? I mean, I get it. Fireworks are cool and drones are cool. Therefore fireworks on drones are cool to the power of two, I guess. But really, it's probably not a good idea to manifest your American pride with this particular version of pyrotechnics. Learn about your ad choices: dovetail.prx.org/ad-choices

The dogs will lose their minds. They always do. Every Fourth of July in America, as children stay up past their bedtime to watch colors explode in the sky and adults sit on the back of pickup trucks drinking beer and marveling at a pyrotechnic technology 12 centuries old, pets across the country panic with every boom. Sound phobias are very common for dogs—and cats—making this holiday a nightmare for millions of animals. Learn about your ad choices: dovetail.prx.org/ad-choices

The giant hogweed is hard to miss. The monstrous plant towers up to 15 feet tall, with a crown of white flowers the size of an umbrella. They burst into bloom between the last week of June and the first week of July—just in time to be the perfect dramatic backdrop to red-white-and-blue-themed parties. But whatever you do, don’t touch it. The giant hogweed’s toxic sap could give you third-degree burns if you don’t get out of the sun and wash it off immediately. Learn about your ad choices: dovetail.prx.org/ad-choices

Having grown up in Tucson, Arizona, one of the sunniest cities in the world, I consider myself well-versed in the carcinogenic threat of UV exposure, the skin-sparing sanctity of shade, and the redeeming qualities of the sartorial atrocity that is the broad-brimmed hat. I am also a compulsive sunscreensplainer. Learn about your ad choices: dovetail.prx.org/ad-choices