• The kelp best known as an ingredient in miso soup has invaded the San Francisco Bay, worrying environmentalists because of the risk it could pose to the area’s delicate ecosystem. Just when you thought it was safe to go in the water…
• One small step for man, one giant leap for Twitterkind! Nature News is twittering the Apollo 11 mission in real-time as it happened 40 years ago.
• If you’ve ever yearned for the chance to re-make Star Wars: New Hope, here’s your chance: The Web site Star Wars: Uncut is crowd-sourcing the movie, offering 472 15-second clips of the film to re-make.
• The Toronto International Film Festival will commence with a documentary of Charles Darwin, brought to you by movie stars and real-life couple Paul Bettany and Jennifer Connelly, who star as Darwin and his wife, respectively.
• And finally, check out this video of, well, the world’s fastest everything…clapper, cup stacker, sprinter. We got tired just watching it.
It looks like a carp, swims like a carp, and may even smell like a carp. But a fish being released into the waters of northern Spain is really a pollution-detecting robot.
Scientists in the U.K. have developed a robotic fish with tiny chemical sensors that detect potentially hazardous pollutants in the water. Researchers plan to release the fish into the water by the end of next year, and if the first batch of five is successful, they hope to use the fish to detect pollution—both on the surface as well as dissolved—in water systems around the world.
At 1.5 meters in length, the fish will be about the size of a seal, and will swim and wriggle just like real fish, at a maximum speed of about one meter per second. Unlike other robotic fish that are operated by remote control, the robot fish will be able to navigate autonomously, swimming through port areas and transmitting information via Wi-Fi to a control center. It will even know when it has to go back and recharge, so it won’t be left stranded by a dead battery.
As if cow burps weren’t enough to worry about as the earth’s atmosphere heats up, scientists have now discovered that aquatic animal belches might be another source of greenhouse gas emissions.
When nitrate is present in water, worms, mussels, freshwater snails and other underwater creatures emit nitrous oxide as a by-product of digestion. The animals obtain their food from soil, which contains bacteria that survive “surprisingly well” in the gut and are thought to convert nitrate in the water into nitrous oxide gas.
While nitrous oxide is known for its use as dentists’ laughing gas, it’s also 310 times more effective at trapping heat in the atmosphere than carbon dioxide. Earthworms also emit the gas because of soil rich in both nitrogen and the microbes that convert it, but the new study illustrates that marine mammals may be pumping it out as well.
Researchers in Monterey Bay have released pictures of the first Macropinna microstoma to be found with its “soft transparent dome” intact. The six-inch “barreleye” fish lives more than 2,000 feet below sea level and spends most of its time motionless, but has eyes that can rotate within its head, allowing it to see whatever is directly above it.
The details of animal mating can be ruthless, calculated, and remarkably graphic. But it’s a process that must be done for every creature, including the market squid, or Loligo opalescens, which lives—and breeds—along the Pacific coast. Over at Slate, oceanographer Miriam Goldstein has a list of techniques necessary for the foot-long invertebrate to mate successfully—which also means successful eating for the sharks, dolphins, sea lions, and scores of other aquatic creatures who make them a regular lunch. As with just about all marine life, the squid are currently being fished to the brink, making it all the more necessary that their short period of amorousness, which begins this month, comes to fruition.
So just how does a squid have sex, anyway? According to Goldstein:
During mating, the male’s sperm-delivery tentacle grabs a package of sperm, called a spermatophore, from under his mantle, the hatlike covering over the pointed end of the squid. He slips his tentacle under the female’s mantle and deposits the spermatophore next to her oviduct. When she lays the eggs, they brush by the spermatophore and are fertilized.
The steps that males can take to up their reproductive chances range from positioning themselves at the bottom of the sea/orgy to turning their tentacles bright red to intimidate other suitors to “spooning,” or sticking close to a fertilized female to make sure another male doesn’t swoop in at the last minute.
DiscoBlog is DISCOVER's compendium of quirky, funny, and surprising science news from the edge of the known universe. It's edited by Eliza Strickland, and written by Brett Israel and Andrew Moseman.
• The kelp best known as an ingredient in miso soup has invaded the San Francisco Bay, worrying environmentalists because of the risk it could pose to the area’s delicate ecosystem. Just when you thought it was safe to go in the water…
As if 
Seemingly straight out of a science-fiction movie, a fish with 
The details of animal mating can be 
