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Alicia Chang

FILE - In this Jan. 22, 2015, file photo, people walk toward Sleeping Beauty's Castle at Disneyland in Anaheim, Calif. A measles outbreak that began at Disneyland and reignited debate about vaccinations is nearing an end. The outbreak will be declared over in California on Friday, April 17, 2015, if no new cases pop up, according to the California Department of Public Health. (AP Photo/Jae C. Hong, File) (AP)

Disney-linked measles outbreak soon to be over in California

Alicia Chang

Cutting back on water use: Q&A on California’s drought

Alicia Chang

NASA’s Dawn spacecraft moves in on dwarf planet Ceres

Alicia Chang

Pediatrician Charles Goodman holds a dose of the measles-mumps-rubella vaccine, or MMR vaccine at his practice in Northridge, Calif., Thursday, Jan. 29, 2015. Some doctors are adamant about not accepting patients who don't believe in vaccinations, with some saying they don't want to be responsible for someone's death from an illness that was preventable. Others warn that refusing treatment to such people will just send them into the arms of quacks. (AP Photo/Damian Dovarganes) (AP)

Some doctors won’t see patients with anti-vaccine views

Alicia Chang

This Jan. 22, 2014, artist concept rendering provided by NASA shows their Orbiting Carbon Observatory (OCO)-2. The OCO-2, managed by NASA's Jet Propulsion Laboratory in Pasadena, Calif., will launch from Vandenberg Air Force Base, Calif., on a Delta II rocket on July 1, 2014. Five years after a NASA satellite to track carbon dioxide plunged into the ocean after liftoff, the space agency is launching a carbon copy _ this time on a different rocket. The $468 million mission is designed to study the main driver of climate change emitted from smokestacks and tailpipes. (AP Photo/NASA/JPL-Caltech) (AP)

NASA to launch global warming satellite after loss

Alicia Chang

Endeavour’s final journey lasts all night

Alicia Chang

Touchdown: NASA rover Curiosity lands on Mars

Alicia Chang

Potato chips are piling on the pounds, study finds

Alicia Chang

In this photo taken Monday, Dec. 13, 2010, anesthesiologist Liu Jianmin prepares for an abortion at a clinic run by Marie Stopes International in Xi'an in central China's Shaanxi province. While comprehensive data are hard to come by, official figures show abortions are increasing, and Chinese media and experts say many if not most of the abortion-seekers are young, single women. (AP Photo/Ng Han Guan) (AP)

Abortion does not harm mental health, study says

Alicia Chang

In this Sunday, Jan. 9, 2011 photo provided by the office of Rep. Gabrielle Giffords, Mark Kelly, Giffords' husband, holds the congresswoman's hand in her room at University Medical Center in Tucson, Ariz. Giffords was shot in the head during a political event in Tucson on Saturday. (AP Photo/Office of Rep. Gabrielle Giffords) (AP)

Giffords taken off ventilator, breathing on her own

Alicia Chang

FILE - In this Jan. 11, 2011 file photo, Dr. Peter Rhee, Trauma and Critical Care Emergency Surgery doctor at University Medical Center, describes in more detail the gunshot wound Rep. Gabrielle Giffords, D-Ariz.,received on Saturday, during a news briefing at UMC in Tucson, Ariz. Giffords remains in critical condition, but doctors have reported steady progress each day since she was wounded last weekend. If all goes well, she may be "out of the woods" on Friday, said Rhee. (AP Photo/Ross D. Franklin, File) (AP)

At Giffords’ bedside, good news keeps coming

Alicia Chang

In this Sunday, Jan. 9, 2011 photo provided by the office of Rep. Gabrielle Giffords, Mark Kelly, Giffords' husband, holds the congresswoman's hand in her room at University Medical Center in Tucson, Ariz. Giffords was shot in the head during a political event in Tucson on Saturday. (AP Photo/Office of Rep. Gabrielle Giffords) (AP)

Giffords is “one of the lucky ones,” say doctors

Alicia Chang

In this March, 2010 photo provided by the office of Rep. Gabrielle Giffords, Giffords poses for a photo. Giffords was critically wounded during a shooting at a political event Saturday, Jan. 8, 2011 in Tucson, Ariz. (AP Photo/Office of Rep. Gabrielle Giffords) (AP)

Doctor: Giffords breathing on her own after attack

Alicia Chang

FILE - The moon appears totally covered by shadow as the earth passes between the moon and the sun, during the lunar eclipse in this Jan. 9, 2001 file photo taken in Kiel, Germany. On Tuesday Dec. 21, 2010 the first day of northern winter, the full Moon passes almost dead-center through Earth's shadow. The eclipse begins at 1:33 am EST. At that time, Earth's shadow will appear as a dark-red bite at the edge of the lunar disk. It takes about an hour for the "bite" to expand and swallow the entire Moon. Totality commences at 2:41 am EST and lasts for 72 minutes. According to NASA the last total lunar eclipse that happened on the winter solstice was Dec. 21, 1638. The next one will Dec. 21, 2094. (AP Photo/Heribert Proepper, File) (AP)

2010’s total lunar eclipse is tonight

Alicia Chang

Stem cells reverse blindness caused by burns

Alicia Chang

Northwest at risk of earthquake like one in Chile

Alicia Chang

Chile quake similar to 2004 Indian Ocean temblor

Alicia Chang