Forgetting, reminding, and remembering: The retrieval of lost spatial memory
Most forms of memory loss are caused by some type of brain injury -- particularly to the hippocampus. Amnesia can arise from brain damage that interferes with memory storage, retrieval, or consolidation. What ultimately causes amnesia -- a failure to store memories or a failure to retrieve them -- is not clear.... ...A major challenge in resolving this question experimentally is being able to d...Mammoths stranded on Bering Sea island delayed extinction
Woolly mammoths stranded on Pribilofs delayed extinction ...Fossil is first record in the Americas of a mammoth population to have survived the Pleistocene ...... St. Paul, one of the five islands in the Bering Sea Pribilofs, was home to mammoths that survived the extinctions that wiped out mainland and other Bering Sea island mammoth populations. ...... In an article in the June 17, 2004 edition...New Worlds Of Order, Argentine Ants Succeed By Outnumbering The Competition
.They are quiet, live mostly underground, and they don't sting humans. But even.insect lovers dread the arrival of Argentine ants (Linepithema humile). The.voracious appetite of this alien species and its tendency to displace native.ants has been well documented, but until recently scientists knew very little.about the specific mechanisms used by the insect to gain control of a particular.area...