Happy Friday. Lotsa links for your weekend. Science:

Hippos are photographed biting a crocodile to death
Virus helps save the American Chestnut tree
Say hello to a titanic ancestor
Can We Build Our Way to Reduced Carbon Emissions?
Heritability of sociopathy
Climate change catastrophe took just months
Other:
Why you can’t trust a damn thing they say
They forgot
Facebook Confessions
President Announces Realistic Hope Agenda
Afghan Escalation Would Make One-Year Pentagon Budget Almost As Big as Entire 10-Year Health Bill
What the Future May Hold
A false choice in health care battle
You have no rights
Why the Federal Reserve should LITERALLY throw money out of helicopters
Pinker on “What the Dog Saw.”