Andrea Thompson

See who ranked highest and lowest for their city's parks.

Damage path appears as beige streak across the Oklahoma landscape.

Part of trip to circumnavigate Northern Hemisphere.

Research shows sea ice formed and melted like it does today.

Cold weather also brought snow to France; ski resort re-opens.

More climbers attempting summit, clogging paths.

Debris is about half that created by the EF5 that struck Joplin, Mo.

Obama credits forecasters with helping to warn residents in time.

Section of river through city opening to kayaking, fishing.

The basic facts and most-asked questions.

Tornado is unrated, but has caused considerable damage.

The tornado caused less damage than others in nearby towns.

Antarctic tourism numbers increased last year from previous season.

Agency evaluates site before World Heritage Committee meeting next month.

Interactive app features stories of Arctic animals and communities.

Pirates keeping away ocean-drilling ships.

New list takes into account full area hit by tornadoes.

Source of key reactions found in snow atop sea ice.

The eminent naturalist has long played second fiddle to Darwin.

The plumes were whipped up in an area experiencing drought.

Both are ecosystem that used to be more widespread.

R/V Sally Ride will explore the mysteries of the ocean.

New analysis suggests he was about 80 miles shy.

Some have nose like Pinocchio, others looked like they bumped their head.

Cyclone Victoria took the shape of the letter over the Indian Ocean.