Why Dogs Are Smarter Than Cats

Dogs are smarter than cats for a reason.
Dogs are more sociable animals and sociability requires more brain power.
So, over millions of years, dogs have had to develop bigger brains than cats. Dogs need more brain capacity because they are not solitary.
That's the result of an exhaustive study by researchers at Oxford University. The researchers attempted to study the development of different groups of mammals over millions of years.
The more sociable the mammal group is, the smarter it tends to be. 
Click here for more on this fascinating story from Science Daily.
BTW: Elephants (also mammals) are incredibly smart. Elephant brains — weighing more than 10 pounds — are so advanced that zoologists have measured behavior that reflects compassion, sympathy, and grief. And of course elephants are remarkably social.

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Video: Baby Elephant Sneezes At Tourists

EMBED-Baby Elephant Sneezes at Tourists - Watch more free videos

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World's Largest Testicles Discovered

Researchers from the University of Derby and the University of Cambridge in Britain have discovered that the Tuberous bushcricket (Platycleis affinis) has testes which are 14 percent of the male body mass, setting a world record.
The lead researcher for the team that made the discovery said, "We couldn't believe the size of these organs, they seemed to fill the entire abdomen."
"We are also interested in the reason why they are so large," the researcher added. "An almost universal evolutionary rule appears to be that such variation in relative testes size is linked to female mating behavior; testes tend to be larger in species where females are more promiscuous, as has been demonstrated in various species in fish, birds, insects and mammals."
It was also discovered that the huge testes on the bushcricket  did not translate into greater sperm production. A type of fruit fly may still hold the world's record for the longest and must abundant sperm.

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