In this issue:
"Dawn of the Deed": Fish fossils have pushed back the origin of copulation in backboned animals – suggesting a key turning point in our evolution.
"Contact: The Day After": A worldwide collaborative effort to search for extraterrestrial intelligence has astronomers believing we are going to pick up a signal from an extra terrestrial very soon.
"Flu Factories": The next pandemic virus may be circulating on U.S. pig farms, but health officials are struggling to see past the front gate.
"100 Trillion Connections": The noise of billions of brain cells trying to communicate with one another may hold a crucial clue to understanding consciousness.
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