Frogs Come Alive After Winter Thaw | National Geographic

less than 1m read

·Nov 11, 2024

NARRATOR: While the rivers and ponds are melting, the ground remains frozen. And under the leaf litter, someone is pulling off a miracle. [intriguing music] This wood frog is frozen solid. Even his eyes are iced over. There's no pulse, no breath. Slowly the warmth of spring begins to thaw, from the inside out. His heart starts beating. [dramatic music] His brain lights up-- [intriguing music] -- and he begins to move. It turns out that the frog's liver pumped a syrupy, natural antifreeze into his cells in the fall. It kept his organs from freezing. Only the water between cells froze. After eight months frozen, he's completely undamaged, and leaping straight for the nearest pond. [water splashing] Now, Alaska's least welcome yearly arrival slowly bursts from its watery home-- the mosquito. [intriguing music] And it immediately wants blood. Not even cold-blooded frogs are immune. The number of mosquitoes here far outstrips that in any jungle on earth. [music continues] [water splashing] [mosquitoes buzzing]

Trade and tariffs | APⓇ Microeconomics | Khan Academy

Common percentages

View All

Safari Live - Day 198 | National Geographic

This program features live coverage of an African safari and may include animal kills and carcasses. Viewer discretion is advised. Good afternoon, and a very warm welcome to a sunny, beautiful afternoon in South Africa. As you can see, there are some big…

Capacitor i-v equations

We’re going to talk about the equations that describe how a capacitor works, and then I’ll give you an example of how these equations work. So, the basic equation of a capacitor says that the charge Q on a capacitor is equal to the capacitance value time…

Translation (mRNA to protein) | Biomolecules | MCAT | Khan Academy

So we already know that chromosomes are made up of really long strands of DNA all wound up into our into themselves. Something like I’m just kind of drawing it as a random long strand of DNA all wound up in itself. On that strand, you have sequences which…

How the Mojave Desert Compares to Mars | National Geographic

Exploration is a compulsory human trait. We’re the only animal on the planet driven so deeply by curiosity. From the surface of the Earth, the ocean floor, to space. Humans have an insatiable desire for adventure and exploration. These days we’ve been tu…

2015 AP Calculus AP 2b | AP Calculus AB solved exams | AP Calculus AB | Khan Academy

Part 2b: Region S is the base of a solid whose cross sections perpendicular to the x-axis are squares. Find the volume of the solid. All right, so region S we see it right over here. In the last part, we already said that this function is f and this func…

Adding with integer chips | Integers: Addition and subtraction | 7th grade | Khan Academy

Let’s say I wanted to figure out what negative 2 plus negative 4 is equal to. There are a bunch of ways of thinking about them, but what we’re going to do in this video is think about it using something called integer chips. So, with integer chips, if I …

Frogs Come Alive After Winter Thaw | National Geographic

More Articles