Eastern populations of the North American monarch have declined by 90 percent over the past 20 years. Conservation biologists hope that the buzz about the butterfly highway will inspire the public to join efforts to preserve habitat.
Azerbaijan has long been a key piece in the US's foreign policy puzzle, writes Nick Cunningham, and news that Congressmen traveled there at the expense of a state-owned oil company is the latest link between the countries.
Shell Oil rigs are in Seattle, on their way to Alaska for offshore drilling. Hundreds of protesters paddling nearby are planning acts of civil disobedience in hopes of preventing damage to the Arctic and the effects of climate change.
Once down to just three small breeding groups in 1992, the Louisiana black bear has clambered back from the brink of extinction. From bald eagles to mountain lions, some of America's rarest beasts have once again found sure footing.
Environmental groups say the Santa Barbara oil spill points to the dangers of a planned expansion of tar sands oil production in California. But other experts say pipelines remain by far the safest way to transport oil.
Crude prices have risen over the past few weeks, after collapsing from $100 a barrel last summer to around $50 a barrel early this year. But as James Stafford writes, some predict prices could fall again later this year.
Iraqi oil production is growing, writes Nick Cunningham, even as Islamic State gains ground. The global glut of crude has insulated markets against geopolitical shocks, and the fall of Ramadi hasn't impacted production in Iraq's oil-rich South.
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