A. Not only can jellyfish withstand the impact of climate change, they also have the capacity to accelerate it.

B. At the same time, jellyfish also consume vast amounts of plankton, which are a major means of taking carbon dioxide out of the atmosphere and oceans. Their loss can hasten climate change.

C. Jellyfish are better prepared than other marine life for the changing ocean environment, such as warmer temperatures, salinity changes, ocean acidification and pollution.

D. They release carbon-rich feces and mucus that bacteria prefer to use for respiration, turning these bacteria into carbon dioxide factories.

A. Athletes may not be role models, but they’re certainly digital lightning rods.

B. Nearly twenty years ago athletes did as they pleased, only entering the public news scope if an off-the-court/field dustup was so monumental that the nightly news couldn’t afford not to cover it.

C. Athletes might want the ability to make millions while still being able to crack off-kilter and slightly offensive jokes without seeing the number of zeroes in their paycheck affected, but that’s not how it works.

D. Today, thanks to the advancement in social media with tools like Facebook and Twitter, athletes have signed up for a 24 hour a day news conference.

A. According to scientists from NASA's Jet Propulsion Laboratory, the current melting of ice in Greenland is already causing the tilt to change at a rate of approximately 2.6 cm each year.

B. While a natural event such as this could bring about major changes to the climate, some scientists are warning that there is a possibility for reverse feedback.

C. The Earth's orbital tilt is said to vary between 22 and 25 degrees roughly every 41,000 years.

D. In other words, instead of an orbital tilt causing climate change, current changes in climate could end up causing changes in the Earth's axial tilt.

A. One of the beauties of Leo Tolstoy’s novel 'War and Peace' is that it does not end when the war ends.

B. It ends instead when the hero gets married, and settles down to a life of routine, even boredom.

C. In conveying this ceaseless ebb and flow of life, Tolstoy captures its very essence.

D. Concluding it at the moment of heroic drama would have destroyed the integrity of the novel.

A. What Darwin discovered on the Galapagos Isles was not the idea that species evolved, or even a possible model for how that evolution might have taken place.

B. His ability to see this fact, and exploit it so brilliantly, is why we remember Charles Darwin today.

C. Darwin ultimately owes the near-instant success of his theory to the fact that the islands of the Galapagos made such perfect petri dishes for generating that evidence.

D. Rather, what he found was a naturally occurring laboratory, one exquisitely shaped to allow the study of speciation and to make his model the first supported by real evidence.