This strange vehicle has no motor, batteries or fuel, yet it managed to reach 27.7 mph in a 10 mph tailwind. The claim was so counterintuitive that a UCLA physics professor bet $10,000 that the ...

Killer whales, or orcas, are among the most intelligent predators in the ocean, growing up to 8,000 kg and hunting in highly coordinated groups. Instead of attacking randomly, they work ...