Dr. Roger Nasci, a mosquito expert at the Centers for Disease Control and Prevention, says you don't necessarily need repellent with a high percentage of DEET to keep the 'skeeters away. Repellant still works well in low doses, and so far mosquitoes aren't growing resistant to it.
Biologists have discovered they can track hard-to-see species in streams, ponds and even the ocean by sampling the water for DNA. Scientists say the technique is an important conservation tool: So far, it's been used to track declining giant salamanders and even locate a rare whale.
Off the coast of central California over the weekend, two divers were in the water when a pair of humpback whales surfaced just feet away. The huge creatures were feeding on small fish and experts say the two divers are lucky they weren't injured.
Dolphins, like humans, are part of complex social networks. And research now indicates that they use their unique whistle sounds to identify and communicate with each other. "Every time a dolphin heard its signature whistle, it called back, sometimes multiple times," one researcher says.
The "world's most endangered feline species," the Iberian lynx, faces continued pressure because its prey is disappearing. Researchers say the cats need to be introduced to parts of the Iberian peninsula that are higher in altitude and latitude.
If you think deep yellow yolks are an indicator of higher nutritional value in eggs, think again, scientists say. Egg yolks come in a rainbow of colors — from pale white to red orange or pink. They may look strange, but they're still good for you.
Biologists who study the lives of animals can learn a lot simply by listening to them. The problem is that natural sounds can be far easier to record than to analyze. So scientists are working to automate the process with automated systems that do the identifying for them.
A fossilized Tyrannosaur tooth found lodged between bones in a Hadrosaur's tail is giving paleobiologists pretty firm clues about the tyrant king's meal plan. And Hollywood may have been right all along — T. Rex definitely knew how to kill.
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