A program working to slow the speed of vessels to reduce deadly whale collisions is now being expanded to the entire California coast.
A 20-foot-long Minke whale has died after it collided and nearly capsized a pleasure boat in New Jersey's Barnegate Bay on Saturday.
Six gray whales have died in the San Francisco Bay in just the past week alone, bringing the total number of stranded whales to 15 so far this year as authorities rush to figure out what could be causing the sudden deaths.
From solar panels over canals to fashionable clothes with zero waste, watch "ourHome: Earth Month" to learn about conservation efforts near you and across the country.
David Gruber, National Geographic Explorer and founder of Project CETI, discusses how AI is helping researchers decipher whale calls.