Here’s the Valentine we teased above! It needs no explanation.
Download the printable version here.
We reviewed so many gadgets this year. Here's our list of winners for everything that blew us away.
The experiment marks the first known time a satellite has received and acted on a voice command from the ground.
"It wouldn't be surprising if at least 100 kilograms [220 pounds] or so survive reentry."
Cosmos 2612 spent several days stalking a U.S.-operated commercial radar-imaging satellite believed to support the Ukrainian military.
Human activity is putting serious strain on groundwater supplies around the world, a new study suggests.
The last two remaining satellites were transported to an orbital graveyard as the program officially comes to an end.
