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Simulation of aerosols and 2017 hurricanes. Credit: NASA Goddard Space Flight Center

Using NASA mathematical models and satellite observations of sand, sea salt and smoke moving across the Western hemisphere, researchers at Goddard Space Flight Center created this visualization of the 2017 hurricane season.

What you're seeing: Sand and dust from the Sahara (seen in brown), sea salt picked up by the winds of hurricanes Irma, Harvey, Jose and Maria (blue) and smoke from wildfires in the western U.S. (gray) travel thousands of miles on wind. Across the Atlantic, Hurricane Ophelia takes form off the coast of Africa.

Why it matters: Simulating currents — in this case, from July 31, 2017 to November 1, 2017 — can be used to better understand the conditions under which storms form and evolve.

Go deeper

Reddit traders look to pummel Wall Street's old guard

Illustration: Sarah Grillo/Axios

Reddit traders are taking on Wall Street pros at their own game with this basic mantra: Stocks will always go up.

Why it matters: Their trades — egged on in Reddit threads — have played a role in historic market activity in recent days.

The week the Trump show ended

Data: NewsWhip; Chart: Andrew Witherspoon/Axios

Donald Trump was eclipsed in media attention last week by President Biden for the first time since Trump took office, according to viewership data on the internet, on social media and on cable news.

Why it matters: After Trump crowded out nearly every other news figure and topic for five years, momentum of the new administration took hold last week and the former president retreated, partly by choice and partly by being forced off the big platforms.

Pay TV's bleak post-pandemic outlook

Data: eMarketer; Chart: Axios Visuals

The pandemic has taken a huge toll on the Pay-TV industry, and with the near-term future of live sports in question, there are no signs of it getting better in 2021.

Why it matters: The fraught Pay-TV landscape is forcing some smaller, niche cable channels out of business altogether.