Earth Changes
Two of the dolphins were already dead when a team led by IFAW assistant research coordinator Kristy Volker arrived.
The remaining two — a pregnant female and a juvenile male — were transported to Herring Cove in Provincetown around 5 p.m., Volker said. Before they were released, the two dolphins were given a physical check that included an ultrasound and a blood test.

A white-lipped tree frog. Scientists are trying to unravel the cause of thousands of frog deaths in eastern Australia.
Occasionally one will arrive dried and shrivelled up in the post.
She'll pack them in ice in an esky to be taken to her lab at the Australian Museum, where even more samples - green tree frogs, striped marsh frogs and the invasive cane toad among them - are waiting in a freezer for genetic testing.
Rowley and her team, along with scientists at the Australian Registry of Wildlife Health at Taronga zoo and a forensic unit in the NSW department of planning, industry and environment, are trying to solve the mystery of what is killing Australia's frogs.
Since late July, they've collected 1,200 records of dead or dying frogs, about 70% of them in New South Wales and 22% in Queensland.

The summer drought created lower yields for Alberta farmers, who are now racing against the clock to get their crops off the field.
Now that harvest season has arrived and they need dry weather, the sky has brought forth showers.
"(Crops) are considerably less than what they would be on a normal year," Christi Friesen, who has a grain farm near Peace River, Alta., told CBC's Edmonton AM on Wednesday.
Friesen grows canola, barley, oats and wheat. Because of the drought that persisted through the summer, some of her crops yielded less than 25 per cent of normal, she said.
Barley, for example, normally comes in at more than 100 bushels per acre. "We're lucky to hit 30 this year," she said.
"Visitors were treated to dramatic skies and ever-changing shades of blue on the lake to go along with brisk gusty winds," Crater Lake National Park wrote on Facebook Sunday morning. "Today's forecast is for one more day of glorious rain and snow."
Authorities had already begun evacuating the infirm and some farm animals from the surrounding villages before the eruption, which took place on a wooded slope in the Cabeza de Vaca area at 3:15 p.m. (1415 GMT), according to the islands' government.
Immediately after the eruption, the municipality urged residents in a statement to "exercise extreme caution", and stay away from the area and off the roads.
The population of nearby villages were told to go to one of five centres to be evacuated, and soldiers were deployed to help.

The first lava began spewing out of a fissure close to Mount Fagradalsfjall on the evening of March 19
The first lava began spewing out of a fissure close to Mount Fagradalsfjall on the evening of March 19 on the Reykjanes peninsula to the southwest of Reykjavik.
And the ensuing spectacle—ranging from just a slow trickle of lava at times to more dramatic geyser-like spurts of rocks and stones at others—has become a major tourist attraction, drawing 300,000 visitors so far, according to the Iceland Tourist Board.
Iceland's sixth volcanic eruption in 20 years is already longer than the preceding one in Holuhraun, in the centre-east of the island, which lasted from the end of August 2014 until the end of February 2015.
The famous grove of gigantic old-growth sequoias is under threat from wildfires burning in California's rugged Sierra Nevada.
The world's largest tree by volume, The General Sherman, in Sequoia National Park's Giant Forest, was wrapped in protection against the possibility of intense flames.
Several key buildings and other sequoias were also wrapped.
The aluminium wrapping can withstand intensive heat for short periods.
The incident was said to have happened around 7.10am on Wednesday, September 15, when the victim, identified as Obinna Ude, was taken to the school by his uncle, Chima Ude, for enrollment.
According to a resident of the community, the three-year-old strayed off while his uncle was filling forms and perfecting the enrollment documentation.
The 10 dogs, on sighting the child, broke out of their cage, pounced on the boy and mauled him.

Streets in Tuscaloosa, Alabama, were flooded on Saturday after rain and thunderstorms poured over the area.
Several cars were stuck in the flood water after trying to drive through it, according to the Tuscaloosa County Emergency Management Agency. One person was trapped in their car, the agency reported.
The University of Alabama also reported via social media that the campus had experienced some flooding and warned drivers to avoid campus. By 3 p.m., however, the university announced that all streets on campus were cleared but still warned drivers to be cautious, as more rain throughout the evening could potentially lead to more flooding.
Flood waters were so deep on some streets that residents were even able to swim in it, as one resident in the area captured a video of and shared to Twitter. The Willowbrook Trailer Park in Northport, Alabama, was also flooded.










