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Why Are There So Many More Species Of Insects? Because Insects Have Been Here Longer
April 3, 2007 — Scientists show that many insect groups like beetles and butterflies have fantastic numbers of species because these groups are so old. In contrast, less diverse groups, like mammals and birds, are ... > full story -
Dinosaur Extinction Didn't Cause The Rise Of Present-Day Mammals, Claim Researchers
March 28, 2007 — A new, complete 'tree of life' tracing the history of all 4,500 mammals on Earth shows that they did not diversify as a result of the death of the dinosaurs, says new research published in ... > full story -
Bird Sex Is Something Else
March 22, 2007 — We've all heard about the birds and the bees. But apparently when it comes to birds, they have an unusual take on his and hers -- and the difference is genetic. Research published today in the ... > full story -
Paleontologists Discover New Mammal From Mesozoic Era
March 14, 2007 — An international team of American and Chinese paleontologists has discovered a new species of mammal that lived 125 million years ago during the Mesozoic Era, in what is now the Hebei Province in ... > full story -
Species' Sizes Affect Lives Of Cells In Mammals
March 8, 2007 — Cells from the smallest to the largest of mammals often seem to be "one size fits all." Now a closer look reveals that whether a cell lives in an elephant, mouse or something in between can make a ... > full story -
Human Pubic Lice Acquired From Gorillas Gives Evolutionary Clues
March 7, 2007 — Humans acquired pubic lice from gorillas several million years ago, but this seemingly seedy connection does not mean that monkey business went on with the great apes, a new University of Florida ... > full story -
Size Matters ... If You're A Rodent
February 28, 2007 — Promiscuity is common among female rodents, leading to competition between the sperm of rival males over who fertilizes the eggs. It now seems that possessing a longer penis may give males an ... > full story -
Birth Rate, Competition Are Major Players In Hominid Extinctions
February 18, 2007 — Modern human mothers are probably happy that they typically have one, maybe two babies at a time, but for early hominids, low birth numbers combined with competition often spelled extinction. "The ... > full story -
Largest North America Climate Change In 65 Million Years, Study Shows
February 7, 2007 — The largest climate change in central North America since the age of the dinosaurs 65 million years ago, a temperature drop of nearly 15 degrees Fahrenheit, is documented within the fossilized teeth ... > full story -
Scientists Discover New Species Of Distinctive Cloud-Forest Rodent
January 24, 2007 — A strikingly unusual animal was recently discovered in the cloud-forests of Peru. The large rodent is about the size of a squirrel. The nocturnal, climbing rodent is beautiful yet strange looking, ... > full story
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