Hummingbirds, birch trees, queen bees, northern quolls and more...
Why are so many sea snakes striped? University of Sydney scientists say solid black sea snakes may be at a disadvantage: they are coated with more algae, which slows them down. In underwater lab tests algae bloomed faster on all-dark surfaces, the scientists found; such fuzz causes so much drag it reduces the serpents’ speed by about 20 percent. No wonder black, algae-covered snakes are more often found skulking in coral hideaways than out-and-about striped snakes.
Learn more about sea snakes at the Encyclopedia of Life.
The spectacular sights of the cosmos are now as easy to see as the stars above, with the 18 lavishly illustrated lectures of A Visual Guide to the Universe, produced in partnership with the Smithsonian. Orbit Saturn, search for water and life on Mars, and witness an armada of space telescopes uncovering the secrets of the cosmos.
What If?: Serious Scientific Answers to Absurd Hypothetical Questions [Randall Munroe] on Amazon.com. *FREE* shipping on qualifying offers. From the creator of the wildly popular webcomic xkcd, hilarious and informative answers to important questions you probably never thought to ask. Millions of people visit xkcd.com each week to read Randall Munroe's iconic webcomic.