President Joe Biden plans to announce new federal measures aimed at the climate crisis Wednesday, but will stop short of declaring a climate emergency amid a global heatwave, a White House spokesperson said. Democrats and environmental groups have been calling for Biden to take aggressive actions on climate change after Sen. Joe Manchin, D-W. Va,  said last week was not ready to support key provisions in Congress. Meanwhile, much of the U.S., Europe and other parts of the world are suffering through a record heatwave with little relief in sight.

FIND OUT WHAT EXECUTIVE ACTIONS BIDEN IS CONSIDERING

Americans now have a fourth COVID shot option as the Centers for Disease Control and Prevention authorized a new vaccine from Novavax on Tuesday as new cases surge across the country. The shot is different from the current COVID vaccine offerings as it is a protein-based shot that fights against the virus in a more traditional form of a vaccine. The move to get the vaccine signed off by the CDC is an effort to get the millions of Americans who are hesitant to get inoculated.

HOW DOES NOVAVAX FARE AGAINST NEW COVID VARIANTS?

The evolution of penguins from their flying seabird ancestors into the flightless denizens of marine environments from frigid Antarctica to the tropical Galapagos Islands has long been a mystery. Researchers on Tuesday offered the most thorough examination to date of the history of penguins dating back to their origins more than 60 million years ago, including underwater vision, diving, diet, size and body temperature.

DIVE INTO THE 60-MILLION-YEAR MYSTERY OF THE PENGUIN

What are the two scientific terms used to refer to a group of penguins?

Wednesday's answer: The scientific names for a group of penguins is called a raft when they're in the water and a waddle when on land.