Why to some leaves change color in the fall? This experiment, Leaf Color Chromatography with Bite Sci-zed’s Alex Dainis, is the perfect autumn weekend project to learn about chlorophyll, carotenoids, xanthophylls, and anthocyanins.
Get some rubbing alcohol, white coffee filters, a few clear glasses, scissors, and a wooden spoon. Next, head outside to find leaves that are at different stages of their color change — around 10 per color. For additional info, read more about this experiment at SciAm.
In the archives: more Bite Sci-zed, more autumn, and more experiments.
We watched the June 2013 Grasshopper test when it reached 325m, but this most recent SpaceX vertical takeoff vertical landing (VTVL) vehicle test more than doubled that height, and the close-up shot around the one minute mark is icing on the cake.
On Monday, October 7th, Grasshopper completed its highest leap to date, rising to 744m altitude. The view above is taken from a single camera hexacopter, getting closer to the stage than in any previous flight.
It’s hard to tell here, but don’t forget this incredible note: Grasshopper is ten stories tall.
In the archives: the reusable Grasshopper during its December 2012 test launch from a camera on the rocket.