Whether or not you think humans should be announcing our presence to the cosmos, we're doing it, anyway. Both intentionally, and not. And if aliens really do exist, there are several ways they could find us. Here are six of them.

Antarctica is a vast and dynamic place, but radar technologies -- from World War II-era film to state-of-the-art miniaturized sensors -- are enabling scientists to observe and understand changes beneath the continent's ice in...

Sally Le Page joins us on Quiz Show this week, where we celebrate the submission of her doctoral thesis with the most peaceful, relaxing questions we could devise, assuming you don’t count the volcanoes or screamed-at caterpillars

We here at SciShow like to start things off with a "Boom" for yet another season! Hank talks about the mystery behind the "Space Roar" and why it is we can't really hear it.

Now that we know planets are common in our galaxy, how would we tell if one holds life? Sure, it will take incredibly powerful telescopes and ambitious new space missions, but what are we looking for? What are we listening for? How do we...

With news of radio signals from distant galaxies, a government agency that wants to investigate extra-terrestrial life, and the 66th anniversary of the Roswell Incident, this week has felt like a '90s science fiction melodrama. Hank's...

The reasons why we haven't heard from alien life.

The most intriguing signals SETI ever detected - SHGb02+14a, BLC1 and fast radio bursts.

A manned or unmanned machine designed for space flight.
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A transmitter or receiver that converts alternating electric currents into electromagnetic waves, or vice versa.
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The enormous challenge of building a probe capable of travelling over 1 billion kilometres to reach Saturn's moon, Titan. Physics - Universe - Learning Points. Huygens probe was designed by the European Space Agency at a cost of £400...

The dark side of the Moon remained a mystery until space travel allowed for circumnavigation. What did the astronauts find? Physics - Our Solar System - Learning Points. The Moon orbits around the Earth and spins on its axis. These...

Since 1992 radio telescopes have been scanning deep space looking for modulated radio signals. The type of radio signals we are familiar with can only be generated by intelligent beings but the huge amounts of data collected by the giant...

This video is explaining how WIFI works for kids.

A conversation with Lika Guhathakurta, lead program scientist for new initiatives in the Exploration Technology Directorate at NASA's Ames Research Center in Silicon Valley, and Ryan McGranaghan, postdoctoral researcher from NASA’s Jet...

Jason Wright, professor of astronomy and astrophysics at Penn State, has been thinking about the different technosignatures we could pick up using the telescopes we already have, and the telescopes that we could develop in the future.

Lightning in the clouds is directly linked to events that produce some of the highest-energy light naturally made on Earth: terrestrial gamma-ray flashes (TGFs). An instrument aboard NASA's Fermi Gamma-ray Space Telescope was recently...

GOLD is a new NASA science mission that launches in January 2018 to explore Earth’s interface to space!



GOLD stands for Global-scale Observations of the Limb and Disk. It will inspect the dynamic region of near-Earth space...

Learn all about quasars, extremely bright objects in outer space powered by black holes. This video explains how they were discovered, their connection to supermassive black holes, and their significance in understanding the early...