Obama says parts of climate deal must be legally binding
LE BOURGET, France (AP) — President Barack Obama said Tuesday that parts of the global warming deal being negotiated in Paris should be legally binding on the countries that sign on, setting up a potential fight with Republicans at home.
Mexico experts: passageway may lead to Aztec ruler
MEXICO CITY (AP) — A Mexican archaeologist said his team has found a tunnel-like passageway that apparently leads to two sealed chambers, the latest chapter in the search for the as-yet undiscovered tomb of an Aztec ruler.
AP News Guide: Summit opens debate on ethics of gene editing
WASHINGTON (AP) — Designer babies or an end to intractable illnesses: A revolutionary technology is letting scientists learn to rewrite the genetic code, aiming to alter DNA in ways that, among other things, could erase disease-causing genes.
Timeline of key events in UN effort against climate change
PARIS (AP) — After decades of warnings from scientists that greenhouse gas emissions were warming the planet, governments started coming together in the 1980s to combat the problem. Here's a timeline of key moments in the diplomatic effort to stop global warming, leading up to the U.N. climate conference in Paris: