Wednesday, September 18, 2013
removes the instinctive fear of predators (cats) in rodents, possibly permanently modifying a specific brain function as an evolutionary adaptation for the parasite, which can only reproduce sexually within the cat gut.
Tuesday, September 17, 2013
weak force, one of the four fundamental forces described in the Standard Model, for the proton, the neutron, and the up and down quarks.
Thursday, September 12, 2013
naturally occurring gear mechanism in the hind leg joint structure of the plant hopper (Issus coleoptratus) featuring interlocking cog teeth that ensure a coordinated thrust when the insect jumps with a mechanical synchronization beyond what is capable with the nervous system.
Saturday, September 7, 2013
biological concept of exaptation, an evolutionary phenomenon introduced in 1982 by Stephen Jay Gould and Elisabeth Vrba as a counterpart to adaptation by which existing traits are co-opted for new and advantageous uses unrelated to their biological origin.
Friday, September 6, 2013
volcanic surfacing in Earth's mantle using new models similar to computerized tomography (CT) scans of the human body.
Thursday, September 5, 2013
convergent evolution of similar anatomical and functional features such as sight and echolocation across unrelated species is more widespread at the molecular level than previously thought.
Wednesday, September 4, 2013
Egypt's first state dynasty with King Aha about 3100 B.C.
Tuesday, September 3, 2013
asteroid impact near modern-day Quebec about 12,900 years ago, corresponding to archaeological global climate cooling and the most recent ice age known as the Younger Dryas.