Timing is everything for migratory songbirds chirping away in North America's trees. If they arrive too late, they'll get only the scraps of spring's insect buffet. Plus, the best nesting spots and ...
The vision of human-level machine intelligence laid out by Alan Turing in the 1950s is now a reality. Eyes unclouded by dread or hype will help us to prepare for what comes next.
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