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We summarize the week's scientific breakthroughs every Thursday.
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		PaleontologyL.A.’s Oldest Tourist Trap
Modern excavations at the La Brea tar pits are revealing a wealth of information about local food chains during recent ice ages, as well as details about what happened to trapped animals in their final hours.
By Sid Perkins - 			
			
		AnimalsBeetle fights bass in mouthwash duel
A whirligig beetle duels with a hungry fish by dribbling out a repulsive chemical while the fish tries to rinse it off.
By Susan Milius - 			
			
		AnimalsCheap Taste? Bowerbirds go for bargain decor
When male spotted bowerbirds collect sticks and other doodads to wow females, they don't search for the rare showpiece but go for the cheap trinket.
By Susan Milius - 			
			
		PaleontologyAncestral Handful: Tiny skull puts Asia at root of primate tree
Researchers have unearthed the partial skull of the oldest known primate, a tiny creature that lived in south-central China 55 million years ago.
By Bruce Bower - 			
			
		AnimalsWhale Haunt: Nursing, feeding spot found off south Chile
A survey along the coast of southern Chile has turned up a previously undocumented blue whale hangout that seems to be a feeding ground.
By Susan Milius - 			
			
		EcosystemsBrazil Nut Loss Looms: Harvest may be too heavy to last
A study of 23 spots in Amazonian forests has raised the question of whether the collection of Brazil nuts—praised as a model of gentle forest use—has reached such levels that it may not be sustainable.
By Susan Milius - 			
			
		EcosystemsBrazil Nut Loss Looms: Harvest may be too heavy to last
A study of 23 spots in Amazonian forests has raised the question of whether the collection of Brazil nuts—praised as a model of gentle forest use—has reached such levels that it may not be sustainable.
By Susan Milius - 			
			
		PlantsSweet Lurkers: Cryptic fungi protect chocolate-tree leaves
A whole world of fungi thrives inside tree leaves without causing any harm, and researchers now say these residents may help fight disease.
By Susan Milius - 			
			
		PlantsWarm-Blooded Plants?
Research heats up on why some flowers have the chemistry to keep themselves warm.
By Susan Milius - 			
			
		EcosystemsNew Farmers: Salt marsh snails plow leaves, fertilize fungus
A salt marsh snail works the leaves of a plant in what researchers say looks like a simple form of farming.
By Susan Milius - 			
			
		PaleontologyProud paleontologists proclaim: It’s a boy!
Marine sediments deposited about 425 million years ago have yielded what scientists contend is the world’s oldest undoubtedly male fossil.
By Sid Perkins - 			
			
		EcosystemsUK halts badger kill after study of TB
Partial results from a new study have pushed the United Kingdom to stop its controversial, decades-old policy of killing local badgers if cattle catch TB.
By Susan Milius