From a tiny shark tooth found in the Arctic to electronic tattoos that can monitor brain, heart and muscle activity, Neil Shubin joins us with a roundup of local scientific breakthroughs.

People are still talking about the East Coast earthquake felt from New York to Illinois. We talk with a seismologist about the quake's impact -- and whether it could happen here.

Do people of certain races all look alike? A recent scientific study delves deep into the so-called "other race effect." Ash-har Quraishi explains the science behind the study and how it could have practical applications in the justice system.

More and more medical providers in Chicago are switching their patient's paper records to electronic. But the conversion is giving some doctors headaches, and has some health officials alarmed. Paris Schutz has the story.

We talk with Chicago architect Adrian Smith, who, along with his firm, has been picked to design the world's tallest building — to be built in Saudi Arabia.

What do you get when you combine state of the art technology and role playing? Ash-har Quraishi takes us inside the simulation program at Northwestern University's Feinberg School of Medicine, where students are getting real-life medical experience in a virtual emergency room.

Henrietta Lacks died of cervical cancer in 1951. But her cells kept living, starting a scientific revolution and a multi-billion dollar industry. When members of her family found out, they felt angry and exploited. We revisit our recent conversation with the author of a best-selling book about the story.

Snakes have escaped Lincoln Park Zoo and are on their way to the suburbs. Paris Schutz has more on where they've landed and why.

With nearly 400 Borders bookstores soon to close across the country, we talk to a panel of experts about the future of books and the ongoing transformations in publishing and how we read.

Chicago has become an alternative energy hub. We talk to one of its pioneers about the economic impact of green energy.

It's hot in Chicago, and climatologists are predicting the city could feel like the Deep South by the end of the century. How is the city preparing for the possibility of such a drastic change? We hear about the Chicago Climate Action Plan.

This week on Chicago Tonight: The Week in Review, with extreme temperatures blanketing Chicago and government officials ever-mindful of the 800 heat-related deaths in 1995, the city is in full emergency weather mode. Mayor Rahm Emanuel expands recycling by hiring private companies to compete against city haulers for the contract. Illinois' newest casino in Des Plaines is a big winner, but Gov. Pat Quinn is still waiting for the gaming expansion bill to be sent to his desk. And in sports, the NFL and the Players Association are close to a deal to save the football season.

How are Chicagoans dealing with this hot summer weather? Ash-har Quraishi braves the heat to gauge local reaction.

The heat wave is on and it won't let up! Why is this happening? Why is 2011 a year of major snow and sun? Eddie Arruza and our panel talk about the meteorology behind the extreme weather. More on Paul Sirvatka More on Gino Izzi Chicago Sun-Times article

The U.S. space shuttle program has come to an end with the Shuttle Atlantis returning to Earth early this morning. Eddie Arruza talks to a former Chicagoan and shuttle astronaut on what the 135 missions accomplished and what's ahead for the U.S. space program. More on Robert Satcher Follow Satcher on Twitter NASA

Eliza Fournier of the Chicago Botanic Garden joins us with advice about taming your tomatoes and tips on how to manage your garden in the heat.